I've fallen in love with ceramic keycaps and built two very heavy but very satisfying keyboards with them. But now I crave for more.

One thing that I find somewhat disappointing is the fact that I never found any other vendors besides cerakey for ceramic caps. It's not that I don't like them, but I could go for other styles and layouts given the opportunity.

The other thing is that I would like to explore other materials. I've found wooden caps, again only from exactly one vendor and stainless steel caps by yet another single vendor.

What I would much rather try out are aluminum and glass, both materials I could imagine being pretty great for typing.

And maybe there are other options I haven't even considered yet?

Give me your best shops/stores with rare materials caps, I'm really interested!