Did you ever find out about this? The brace's certainly do look different. If you phone Orange and give them the serial number off the bottom bracket they *might* be able to give you some history.
I'm selling my UFO on the ebay, no reserve 99p starting price...
http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... 499wt_1159
really nice bike and pretty original have a look and treat yourselves with a cheeky bid!
Strangely i've just picked up a dirt cheap UFO too and was thinking about upgrading the suspension. Lots of very useful information here guys, thanks!!!