Need a 51 Mercury Merc-O-Matic rebuild

Hi HAMBers,
My brother is looking for someone who's really knowledgable in rebuilding a stock 51 auto transmission. He lives in the Charlotte North Carolina area. Any advice would be greatly appreciated. Thank you

 

They are very similar to a 60s COM and the later FMX so if you find someone who can work on a FMX they should have no problem fixing the 51 trans.

 

I'll pass the info and also look into it, thank you. Anyone know a transmission shop or guy that specializes this in the Carolina's? Thanks guys.