wow. who are you, anyway? if your freind is rich, why does he need you to search for the "Best deals"? buy psc and be done with it. why do you need help finding a pop off hub? they are everywhere, dude. if hes built this buggy, cant he build the shaft from steering wheel to orbital, if its even needed? full hydro, right?
yep, thats what i'd do. go right down to 4wp's and ask their advice on building a buggy. (sarcastic). my humble opinion. seriously, are you for real?