Early A body 3 peed tranny.

Looking for a Early A body 3 speed.
23 year old friend has a 64 Dart that the 3 speed is getting bad in.
We are needing something to drop in or rebuild while he is driving the car.
This is his daily guys so any help to the young man would help a young Mopar enthusiast.

We are in 72936 Western Arkansas or Eastern Oklahoma.

Thanks in advance FABO.