Try ave Marsh at Universal Cycle Centre in Maltby (nr Rotherham) 01709 813089 I am sure he said he had them in stock when I was chatting to him a few months ago
I've got a couple of XA's one 100mm, the other 110mm, if you're interested?
Both in good condition, but have some sctratches below the point they've been inserted into the steerer, above that they look pretty good