The Robins boss jokingly made the same appeal to supporters and was astonished by the response.
The Robins boss was speaking after Cooke featured prominently in Rovers 20-18 home win over Bradford.
Manager Alun Rossiter told BBC Wiltshire that Zagar has added a new dimension to the Robins.
The Robins completed the signings of Simon Stead, Krystof Stojanowski and Ryan Fisher last week.
The Robins will have another chance to advance when they play in the preliminary semi-finals next week.
The victory puts the Robins' challenge for an end of season play-off place very much back on track.
If the Robins reach the Premier League he will have won promotion through every division from the Conference.
The 29-year-old joined the Robins in November 2008 from Leicester City and scored 10 goals in 50 appearances.
That would mean the Robins having to go in to what Baker feels is an already inflated transfer market.
Cooke's high-profile move to the Robins was completed on Friday, a week after rumours of the switch first circulated.
The Robins started brightly as Ben Galea, Ben Fisher and Peter Fox crossed with Michael Dobson adding the extras.
The Robins' riding order has been altered ahead of the meeting with Poole.
The Robins face Elite League leaders Poole on Thursday at the Abbey Stadium.
The Australian struggled for the Robins and was eventually dropped, before making a dramatic return in the play-off semi-final.
The Robins are unlikely to announce any confirmed signings until after the British Speedway Promoters Association Annual Meeting in November.
Finnigan joined the Harriers from Cheltenham Town in the summer of 2009 after playing over 200 league games for the Robins.
The 27-year-old was with the Robins for the seven years, also spending time on loan at last season's League Two champions Brentford.
The 27-year-old suffered a double compound leg fracture in the Robins' play-off defeat at Leeds last September and has not played since.
Bristol City midfielder Paul Hartley is recalled along with his team-mate Chris Iwelumo, who recently joined the Robins on loan from Wolves.
The 27-year-old has been omitted from the Robins' last two matches for disciplinary reasons and Morgan warned he could waste his undoubted talent.
The Robins topped the Elite League table but lost their second play-off final in three seasons, going down to Wolverhampton in the final.
The 39-year-old, who spent five years as player with the Robins between 1999 and 2004, moves to Whaddon Road following Martin Allen's departure.
BBC: Kidderminster's Mark Yates appointed Cheltenham manager
Andrew, 19, impressed in a 10-game spell on loan with the Robins last season having also played under manager Mark Yates at Kidderminster.
BBC: Cheltenham Town sign Peterborough United's Danny Andrew
Mr Collier, a glass-fibre expert, has described the move as a "temporary blip" and says he is confident the Robins will be in production again soon.
The Robins used seven on-trial players in Saturday's 0-0 draw at Leamington and Yates will cut that number for Tuesday's trip to Cirencester Town.
Dutchman Pijper has struggled with his disappointing recent form and failed to score in the Robins' 53-40 home win over Peterborough on Thursday night.
But the Robins at least put a stop to a run of successive defeats that had made for a miserable start to their season.
After securing promotion, and with Swindon in the League One play-off positions, he quit the Robins on 18 February after becoming frustrated by off-the-field issues.
Bradford's forwards were just too strong for the visitors, a fact made obvious when Lynch barged his way over the Robins' line on seven minutes.
But on Thursday Swindon chief executive Nick Watkins confirmed to BBC Radio Wiltshire that Comminges has told the Robins he is set to leave them.
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