Vince Janis. He is an excellent builder and his prices are so cheap, that even if you have to ship your trans to him, it is STILL cheaper than the pricing from other builders.
Here is a screenshot of Janis's contact info and phone number.
Kevin at KDK in Orlando 407-298-2706 has a guy he works with locally that rebuilds them to his specs. After 2 rebuilds by another shop, I let Kevin fix it 1 1/2 years ago and have had no problems since. For a nominal fee, they also R&R it so I didn't have to