.32 or .25
you can find a KT p32 promag 10 rounder, it seems to work for many of the older .32 guns, I know they work in Ruby's, but you have some sticking out.
Otherwise
triple K, but many, well, not a well regarded brand, see if there are any guns that use a similar mag and last, go to the gun store and see if they will let you cram mags till you find one that works.