Oldman, I'm originally from down that way but out of touch with garages in the area. IIRC there
used to be a fella out near Oswestry that was a VAG specialist but that was back in the late 90's and I had an Audi 90 20v.
I used to use town walls
garage (I think it was called) up by the old eye, ear and throat Hospital and they were excellent but I think the old fella that owned it died a few years back.
Any piccys of your Mexico? I had one of those too but that was back in the mid 80's, mine was Daytona(?) Yellow with a lumpy cam, K&N and rejetted 32/36 Weber.
Pity about the bumper, it comes all at bloody once doesn't it