Gasket material for Columbia 2 and 4 reproducers

[Morell1]

I'm rebuilding two reproducers: a Columbia Grand 4 reproducer and a Columbia 2 reproducer. Where can I get gasket material for both? The closest I can find is a gasket for large floating reproducer from The Phonograph Shop: https://thephonographshop.com/products/ ... agm-gasket

Can I just cut this down?

Thanks!

[Morell1]

Just wanted to bump this question up again, in case anytime has any knowledge of these Columbia gaskets