Need dual pedal crank sources

[Carlazzomark]

Does anyone know of a manufacturing source for pedal boat cranks?

Thanks.

[tinhorn]

Y'mean bicycle type? I've bought many parts from bikepartsusa.com . Or do you mean the twisted rod type? You may need a custom fabricator for those. PM me - my brother is a partner in a metal fab shop, and built some cranks for me (way back in the last century) for some carwash equipment I built.