Finding a shop was difficult. I called the shop that rebuilt my steering box, I called who they recommended (which tried to sell me a rebuild--but I needed a 32-spline shaft). I called who those shops recommended. I called rando shops. This is a major metropolitan region so not finding anything was weird.
One shop agreed to take the rebuild. The guy called me 'boss' but otherwise seemed ok and a friend had used the shop. Later, I learned they'd never rebuilt an NP 203. They said three days which was what it took me to replace the output shaft on an SM 465 and input shaft on an NP205 years ago.
All Standard Transmissions
861 Camden Ave, Campbell, CA 95008