Every company I've contacted won't fit 2nd hand or reconed parts other wouldn't do it at all, ended up going with and landrovers of fit a new one. Heard some good reviews about there work
My mate Matt in Cannock will supply and fit of a good quality used unit, driven and inspected internally and with a short warranty, fresh oil etc for about £350.Yes, supplied and fitted. Yes they are used units but anything showing even slight damage or unacceptable wear is instantly rejected. Most garages would charge that just for fitting. If you are on a tight budget I would recommend him no question.
Try asking more! Bell engineering are one of, if not the best place to go to reconditioned parts. Very friendly and helpful. A lot of places will fit parts if they are supplied but won't guarantee the work. I would understand not wanting to fit 2nd hand but I see no problem with recon.