Can you help to identify these frames, bikes or parts?

I'm after a replacement freehub for a set of old Campag Ventos. I'm not sure of the year, I'm guessing around early 90's? I bought a new ITM freehub off ebay, but it's about half a millimetre too wide. You can see it against the orignal part in the second and third photos. (ITM on the left, original on the right)

LBS doesn't stock campag parts, Evans' supplier only stocks recent parts. I've trawled ebay for a couple of weeks and found nothing suitable. At this point I'd even consider replacing the hub, though I can't seem to find one with 20 holes! Please help!!

don't despair so readily.
If campag are anything like shimano, then there will be a bunch of other freewheels that will fit it. Swapping the hub out for the sake of that seems overkill to me.
Is it the bearings that have gone or the actual pawls?