A couple.*
Find a Transtar store. There's one in Grandville. Otherwise, just get from wherever. It's all the same stuff. I wouldn't get anything from ZZP though. They just upcharge for stock stuff you can get anywhere. (Speaking only about trans stuff. Not throwing stones)
I would highly recommend doing the full Trans-Go kit, since you have it all blown apart.
*Get your hands on an ATSG manual and give it a read through. This will show you any areas of concern. As well as check ball location and torque specs for everything. It will save you a ton of frustration.