need some help with transmission on a 94 GS300

i was looking to find out what cars transmissions are the same as the stock one on a 94 GS300. I came across a farly clean one for 400 bucks all good exept the trans. its been flushed and still wont move and the tranny fluid is way high on the dipstick after tring to get it to drive after the flush. if anyone could help me all the searches bring up is auto to man swaps i need to know what cars i can scamp a tranny out of to get this car moving

by the way its a automatic an would like to keep it that way