Recommendations for 4-speed venders.other than Brewers.

I decided not to rebuild the 1976 OD a833 trans that came with my 68 cuda.
I called Brewers to order a rebuilt 833 but they are backed up 14 weeks.
I can't wait that long.
Where else should I look for a good reman a833 a body 4-speed? Like warranty, I don't want to mess with a mystery transmission.
Need a 23/26 trans. Mounting to a 68-838.
Thanks.