ask them how much to swap in a used trans?
call the dealer and ask for a price.
find an independent shop. a decent mechanic should be able to do it. with the trans in the car. parts less than $500, labor less than $500.
or buy a known good used extension housing and just swap that in. i think i have one from a 95 bad trans (no reverse), not sure about the miles.
go to www.car-part.com
for a used trans. put in your zip and sort by distance. shipping is expensive, ~$150.00.