Getting back rather late, sorry...
I made the one in the topic, yet I couldn't make a proper patch file for that.. So.. you just have to put one hour of work and do it yourself. Find Sephiroth battle model, find Cloud battle model, check files and switch not via names, but looks -- as in saam = Sephiroth torso, but caan = Cloud torso, you have to switch saam=>caan not caam (which could be leg). Use a viewer for that. It doesn't take long - unpack the LGP file and toy around a bit. Don't switch the animation and skeleton file though, eye/mouth texture you can. Oh, and the filenames provided are most probably wrong. Use the database on those.