Would you consider carrying out the repair yourself? By far the worst aspect of the job is getting the transmission out and back into the vehicle afterwards. If you have access to a ramp, or know someone that could do this part, then repairing the transmission itself is the easy bit.
https://www.rangerovers.net/threads/...eardown.27361/
http://jagrepair.com/images/AutoRepa...r%20Manual.pdf
http://akpp-ivanovo.ru/wp-content/up...5HP24-diag.pdf
I have loads of (used) parts available if you need them (including a dozen A-clutch drums/input shafts), and I’m only a couple of hours away if you need other help. Just a thought.
Phil