u/SeeJaayPee

Hanlon Motorsports in PA, has great kits for full transmission swaps, depending on horsepower, gears you want, etc. I found out about them through a local shop otherwise I never would have found them. It's making my engine+transmission upgrade a lot easier than getting each part.

https://www.hanlonmotorsports.com/

There's the site, complete packages. Not affiliated with them at all, but nice to have a resource for tranny work.