A Jimby repair to the air intake.

My Mother has bought a 1999 Mazda 626 which I'm trying to make roadworthy, rather too slowly I'm afraid since summer was either too wet (2800 mm over the 3 months), or too hot, 40+ on at least 5 days.
I thought and thought about how to fix the split concertina hose joining the intake chamber to the air filter, and came up with the idea of gluing a bit of old inner tube to the right size and just placing it over the concertina part, hopefully it'll hold.
Unlike many I respect the designers of things like this and think that keeping the original intake flow can only be a good thing as it should aid efficiency and lower noise. I also don't like the idea of spending money.