Exhaust welding near Farnham

[dry664]

Last time my mechanic saw my Porsche 968 he noted that the catalytic convertor was split along the top.
Im trying to find someone relatively local that could remove the exhaust and weld? If its unrepairable then replace the cat with one that I would source.
I'm guessing this would be out of the realms of a bog standard exhaust specialist eg. Kwik Fit? Any advice recommended!