Sometimes it is cheaper to get another used car with a working transmission and just drive it.

If you are in love with the car, then buy a parts car for $50 and swap yourself.

I converted a 1990 Saab 900S Automatic (with a burned out BorgWarner (junk) transmission) to a 5 speed manual. I paid $50 for each car and did the work myself in the driveway. My cost on parts etc plus a lift was about $600. I sold the parted out car parts for around $200 total.

Paying someone else to do the job was not an option for me.
Good luck