I'd like to get hold of some x-ray film for my cyanotypes and I remember my tutor telling me it was both easy to get hold of and relatively cheap but I'm finding that not to be the case. All i can find within my budget is from America. Does anyone know anywhere in the UK where i can find it at preferably less that 100?

Alternatively, if anyone can give me some info on making cyanotypes from my 6x7 negs that doesn't include either scanning and printing digitally or using x-ray film it would be greatly appreciated.