truvativ left crank or chainset wanted

hi folks built a bike for a friend of mine but threads on the left crank are worn!!wondering if anyone has one lying aroucheers!!nd???will buy full chainset if needed..
not sure but the cranks have grooves all the way round it just slides on and allen key bolts tight!!i have a shimano chainset but it seems to attatch differently!!!
Marko, the one I pm'd you about will work for you, let me know if you want it, cheers.