Mica high temperature displacer material for Stirling engine

Testing the heat resistance of various materials for use as displacer in high temperature Stirling engine. This mica sheet for use with toasters or hair dryer heating elements, or as microwave oven wave guide cover is the best thing I've found so far.

[@matigebi6782]

Sir, do you mind if you recommend me a place to find this material
Please

[@peoplesresearchcenter6184]

I originally purchased that sample on Amazon as "Supco Microwave Universal Waveguide Cover, Cut-to-Fit Mica, 10" X 12" MW1012" Apparently, however, it looks like that item is no longer distributed through Amazon. Supco does not sell direct, but you may be able to find a local distributor at the website here: www.supco.com/web/supco_live/products/MW1012.html
Alternatively, this, or a similar material is frequently used in various heating appliances, like toasters. You may also find a "substitute for" the above product on Amazon or elsewhere. I don't know if those are exactly the same composition.