Does anyone know of a source in the UK?
I was using River, but they're currently only selling 467 (..?) That said, they had actually removed their tape media section a few months ago, so I suppose it's an improvement, if not especially useful. Pity, since they were unbelieveably fast at delivery.
StudioSpares also sell 467, 5" 407 and.. something else.. on 1/2" 3600ft spools. I'm not sure but comparing the stock code against an old catalogue, I think the 'something else' is 407 as well.