Thanks Roel, I'll have a good gander on the net as finding a 2.5" 7200 in the UK is proving to be harder than I thought.
I've e-mailed Yamaha and left a voice message so someone should get back.
I've also realised that the Yamaha Club magazine in the UK is based where I live so I'll give them a buzz. I may even get to speak to Glyn Madden (famous organist/keyboard player for those not in UK).