I found a cheap source for PPS cutoffs (
polyphenylen sulfide ) .
Thick plates and thinner sheets available.
I was wondering, what to do with it? You rarely see it for sale.
Quote
wikipedia
PPS is one of the most important high temperature thermoplastic polymers because it exhibits a number of desirable properties. These properties include resistance to heat (220°C), acids, alkalies, mildew, bleaches, aging, sunlight, and abrasion. It absorbs only small amounts of solvents and resists dyeing.
Maybe a new buildplate?