It depends if you're doing a restoration of something really high end or just want a quick job to refresh a playable old box I guess.
For the latter, the price of "official" bellows tape might exceed the price you paid for the squeezebox itself
.
I too am interested in affordable bellows tape alternatives. Some rubbery/painted paper strips should not be this expensive...
The Chinese bellows seem to have some rubbery stuff on them, but it makes a nasty clicking sound when you open the bellows.
Just like a Roland.