Well Nick's birthday tune is an actual song with the riff used as the bed - I can't think for the life of me what it's called but something tells me it's a Blondie song.
As for the 2001+ jingles, there aren't any clean ones I've seen on the web. Simon Parry's website has the 1998-2001 versions clean but the Lincs FM variants of them are available at Steve England's site at www.stevengland.co.uk
if that's of any help. I do believe there are people on this forum who may be able to help you further though.
So do you live in the Hinckley area then? So do I when I'm not in Coventry.