what part of the casing is cracked, the main portion or some of the bits farther out? in one of my less then genuis attempts at car repair I managed to put a hole through mine on the end portion (use jackstands...set the car on them) and managed to get one off of a celica for $10 at a junk yard, the camry would be the same to my knowlege. Usually you can get the whole engine and tranny for around 500 give or take, I'd say pay no more than 200 for a tranny. Lots of people ditch those when they do turbo swaps so you shouldent have too much of a problem. I would suggest tearing it down and replacing the worn out bits if possible.