I did email Dougal registering interest in Georges 'Group 2' 225/55/15-275/55/15 selection.
"Hi, Sorry they are not making that combination. Have you read this thread on the De Thomaso (sic) forum (link to the recent thread)
I sort of guess this is where you're coming from.
Currently we can't get that set up perfectly."
Goes on to say he is going to study the thread more thoroughly, he's been at Goodwood last five days (lucky) and will give a better answer tomorrow. Regards, etc...
I'll let you all know what he says.