Try this link .Adrians Figures produce the old George Turner figures. They may need customising for what you want but paint and filler can create miracles 😀

http://www.kmbc.yolasite.com/adrians-marine-figures.php

try suppliers of dolls house miniatures I believe 1/24 is used for some.

http://www.dollshouse.com/dolls-house-figures

has some I know that others will be out there