Is there any way to have a legal copy of a fansub that I didn make?
Not precisely as such, but… if you purchase an original Japanese copy (on VHS, LD, DVD, or whatever, and legitimate, mind!) and then obtain a fansub, you’re not really breaking the law. Well, yes, you are… but the company that produced the anime in question is not going to see it that way. After all, you’re no longer a scum-sucking bootlegging bastard, you’re a valued customer! (Joking, guys.