Some folding cameras are 120 film (which is still available at about £5 per roll). However, if you buy one that takes 127 film, the easiest thing to do is buy a couple of 127 film spools and a blackout bag (used in darkroom days for loading film into processing tanks) and transfer 120 film (which is the same width) onto the 127 rolls. It's a bit fiddly to start with, but you get used to it pretty quickly.