Were these bikes/frames available to the public to buy? Or were they just made for the Team riders at the time.If they were available for purchase,would they have carried the SB frame numbering as per the other 753 frames.
A few were made available for the public to purchase, but I mean a few (less than 50 someone told me when I was looking three years ago).
If you check eBay regularly and see how often the Limited Edition bikes that were made from 531c with full Shimano 105 turn up and then reduce that by a factor of about x20 you may get an idea of how rare they are.
I reckon you would have a better chance of contacting one of the old Team Banana pros and asking them if they still have their Banana in the shed.
Andrew who did my Banana decals (and yours Nick ) is friends with Adrian Timmis who used to ride for Team Banana and he was inspired enough by my project to digging for his old frame, so some of them still have theirs knocking around.