Another option - rebuild it yourself. There are some excellent 727 build books, plus many experts on here (some have responded). There is a 727 rebuild instruction here: https://www.mopar1.us/727rebuild/

Used Pat Blais, otherwise known as Torqueflite Patty, as a resource for both parts and advice. Great guy, but believe he is retired now tho. Between the 727 books and his advice, managed to rebuild my first 727 to mate with a healthy 440-6. I would email pix/descriptions to Pat and he would evaluate condition and/or remedy if issues were apparent. Upgraded to 4 pinion planetaries, shift kit, better clutches/steels, deep pan, and some new parts, but otherwise no major mods. The advantage, of course, is when completed you possess more knowledge to troubleshoot/repair/upgrade the 727 as needed. As an option you could run a build thread on here and the experts could chime in as needed.