Yeah I want to cut my own plates to customise some boards which I bought before going all-in on split space bar layouts. So I'm looking for somewhere which sells 1.5mm thick sheets in decent sizes. Materials like aluminium, polycarbonate, FR4, carbon fibre etc. If there's somewhere within EU or with decent delivery costs to Europe with a variety of materials and reasonable bulk pricing it would be great.
I have a lot of other projects I work on though, so I'm not just looking for typical keyboard plate material. I've found some luthiery supply stores which are good for decorative/figured wood veneers but the available thicknesses tend to be limited to those typical for musical instruments. Aliexpress as some decent sources for shell veneers (abalone, mother of pearl) but the ones I've found aren't any good for buying in bulk.