I had a rummage in the shed and I have found one good bare XBR frame to replace the snapped one. However it needed a session with a torch and an anvil to straighten out the rear of the frame.
I had bought this frame on Ebay and it looked great in the piccies. However, when I got there I could tell at a glance that it was bent. Mind you it only cost me £10 (plus £20 in petrol) and it's straight enough now so it wasn't a waste of money.
Next step is to fab up some brackets and mounts because this time I am going to hang the chair from a subframe instead of attaching directly to the bike frame. Then it will be off to a friendly welder with some biscuits in hand.
I've got three other XBR frames, but one cannot be used for sentimental reasons, another because it has been converted to accept a Bing carb and I am determined to rebuild the bike to see how it runs and the third because it has a whacking great hole in the front downtube (an XBR weakness).
Not to worry though, I've got another scrapper XBR arriving in a week or two. Mustn't let the stock levels drop eh?
Cheers
GC