toomanyframes, If one of the Hope 22mm mounts mentioned in the linke thread can be of use to you please send me a PM so I can help you out. I've got 3 or 4 other retrobike members who are also after one. You may have to be patient with me though, my contact who manufactured some copies made a first batch which unfortunately had a small measurement error, since this time though he's had a nasty accident and isn't at work at present to do a corrected batch. As and when he does return though I'll happily be in touch with details.
And yes Tony, your % cut is still up for negotiation mate!
I think the frame had a hope mount already fitted, I'll try and get a pic up at some point,it may even be of some use to you.( the mount,not the pic
Sometimes right....Sometimes wrong.....But Always Certain!!