Lord Lucan probably committed suicide in the Channel after leaving Britain, according to his best friend.
The boat, which has paddles and cork life jackets, was made by Bournemouth-based artist Miroslav Lucan.
Ms Findlay said her conscience was clear because she had not helped Lucan escape.
The boat, which the RNLI described as "stunningly lifelike", was inspired by Mr Lucan's love of the coast.
In an interview in 2000, Aspinall said Lucan probably committed suicide by scuttling his boat in the English Channel.
Since Lucan's disappearance there have been more than 70 alleged sightings of him in countries across the world including South Africa, Australia, Ireland and the Netherlands.
Ms Findlay said she had "no idea of the enormity" of the search under way for Lucan who was then the most wanted man in Britain.
Casino owner and conservationist John Aspinall, one of the last people to see Lucan before he disappeared, said he believed the earl's bones were lying "250ft under the Channel".
In the 1970s he tried to destroy Private Eye after it suggested that he had helped whisk away Lord Lucan, a gaming friend who had allegedly murdered his nanny.
She said the children would have visited Kenya and Gabon and Lucan would have been able to see them from a distance but he would not meet them or speak to them.
Mr Lucan, 30, who was born in Slovakia and moved to the UK 10 years ago, said his 3m x 2m (9ft 10in x 6ft 6in) cardboard creation "had to be transportable and detachable".
"Instructions were to make arrangements for John Bingham, also known as Lord Lucan, to see his children and to do that I had to book his two eldest children on flights to Africa, " she said.
She also said Mr Aspinall told her to expect him to announce Lucan's death to the press, a statement which came in 2000 and which she took as a signal that he had died in Africa.
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