It wasn't so identical after all, so I had a wee bit of a mad rush when I left the office at 5:10.
Crisis averted I think. In a mad rush I went to the bike works, they couldn't help, tried the tri centre, it was shut, tried the co op they referred to their mechanics they could help either, tried Velo Ecosse very helpful chap (hadn't seen him before) and he knew what I was on about before I even explained, unfortunately he couldn't help either. Popped by MacDonalds cycles in case the boss (Colin) was in (he's great the staff unfortunately aren't so hot). He tried a couple of other Bianchi's and found an almost identical clamp with my 35.8mm shim it seems a perfect fit. Just chillin out now and watched the Hayles finish, when I can be bothered I'll make tea and carefully tighten the clam with a torque wrench.