[Boatanchors] Looking for source of mechanical part

[Jack Antonio]

I'm looking for some shaft coupler adapters, that will
let me connect a 1/8" diameter shaft to a 1/4" shaft.

My online searches have only found adapters for larger
shaft sizes than this. Maybe I'm not entering the right
search terms.

Anyone know of a source for these?

Also would be nice to find a 3/8" to 1/4" adapter
as well.

I have a few 1/4" to 1/4" couplers, and could
probably kludge up something, but would like to
do it the right way.

Thanks

Jack Antonio
WA7DIA