Tigerlily,
Don't know if this link is any use but I just typed in a search on google for bands in Leeds and this popped up?
http://bands.meefo.com/?bandlocs=Leeds
May be other options - would have thought there must be at least one band available in the area?
We also have some great bands doing NABD events like HOGGZ, and Steve the lead singer is actually a member of UKMOC these days...
http://www.ukmonster.co.uk/monster/member.php?u=2179
However Leeds is a lot further than they normally go for gigs, and they are already booked for the MAD weekend - maybe next year?
http://www.thehoggz.co.uk/intropage.htm