I have a Trani $1200 to a commercial address BUT Yo are getting way ahead of yourself find a shop with Autologic and see what's really wrong with yours even if it is shot you'll need the Autologic to set up the new one. These are a robust trani mine has 200k on it.
A selnoid set is about $400 I think I have one here Trani oil and filter is about $250 and the best part of your mechanics day to do it all.
Have it checked out I honestly doubt your trani is shot completely