No personal experience but Alec Pringle recommended these guys to me a couple of years back when I was thinking about recovering a TR7 seat:
http://www.pipertrimmers.com/
They are at Sparkford, near Yeovil & the Haines Motor Museum. I did the seat myself in the end so I can't comment on their standard of work or prices, but Alec did speak highly of them. Might be worth a call.
Tony
<font size="1">1981 TR7 FHC Cavalry Blue
1980 TR7V8 DHC Jaguar Regency Red - sadly sold!
1977 TR8 FHC EFI Factory development car Inca Yellow</font id="size1">