well, i did a 3sgte swap into a 92 gts with a celica n/a transmission and i do believe i got a custom one thru toysport. they got it thru someone else.
what you'll need to do is get a clutch that will fit the splines and diameter of the camry transmission's input shaft (aka the shaft coming out of the tranny that would meet up with the engine when bolted to the transmission, make sense?). but, you'll want the clutch disc it's self to be the same diameter of an alltrac clutch.
you'll also need the alltrac flywheel and pressure plate. i'd highly suggest that you get your flywheel turned and a new pressure plate. i made the mistake of not doing this and having to replace it all later. you'll also need a new camry release/t.o. bearing.
recap: camry to bearing \ alltrac pressure plate \ hybrid clutch \ alltrac flywheel.
if you need anymore help. let me know.