Wanted LT77 GEAR BOX FOR A 1989 DEFENDER 110

Hi everyone, I need either a replacement second hand box or recommendations for a reconditioned gear box.

I need an LT77 gear box for my 1989, 200tdi, 110 defender. I will get the serial number off it over the weekend.
If any one has a good one or can make a recommendation for a good company that is not going to leave me having to re-mortgage my home, Id like to get it done.

I work off my baby so cant be off the road much longer, its been broke since the beginning of Feb.

Thanks in advance steve

Ashcroft Transmissions are normally the go-to people for gear boxes.