Does anyone know where I could come by some of these?
There's a guy on ebay seems to sell one every week or so at £9.50 + postage but that seems a bit steep.
it's not just the flanges that are wider on 120, the core is quite a bit narrower too... Not something I'd have the patience to do tbh, although If I had access to a lathe for half a hour i'd come up with something out of the big bag of 120 spools I have in the attic (where I load my processing tank - never could get on with changing bags if I don't have to!)