As long as it has a bayonet lug you should be fine. I've seen some more modern clones that don't actually have a lug where it should be.
I grabbed my bayonet from DSA, The frog I got from RTG who has it cheaper.
https://www.robertrtg.com/store/pc/FAL-L1A1-FROG-FOR-BAYONET-NEW-8p8201.htm