A few years ago I started a project for splicing 1-1/2 strips of 120 film and attaching it to salvaged 120 film wrappers.
I would get two 220 rolls from three 120 rolls.
A 102" long x 3" wide splicing table, infrared night vision goggles, some tape, and a cut down 120 wrapper was all It would take.
I still have the drawings on where to make the splices...
About that time my life's activities changed so the project went onto indefinite hold.
But I'm still grouched about Ilford cutting off my cherished film format.
It's ok Simon, I've (sort of) gotten over it.
But if you would market bulk rolls of slit 120 film, some of us would still like to roll our own...