I do use glass but I build my own custom heated plates. nichrome wire + polymide tape + alu plate. Ive found a stack of wool fabric cut into a rectangle the size of the plate is also a very good insulator with a high ignition temp
It’s not very sensible to ask the world where to get something without telling the country or even continent you are in.
So my preconceptions tell me you mean the United States of America.
@Marcus_Wolschon Yes, I’m from the US. sorry about that. Since I get most of my stuff online (mostly china) I’m not very picky on location. Electronic age, internet brings the world closer, global community… and all that. If its flat cut to my dimensions and reasonably priced (affordable on my low budget) I don’t mind waiting a couple/few weeks to get it. Oh and listed above is the state from which I hail.
Contrary to most china stuff you’ll be hard pressed to get free shipping for heavy and large metal blanks
@Marcus_Wolschon ja, aber ich bin auf der Suche nach einem 304mm x 304mm x 3mm flachen Aluminiumplatte. Nicht zu schwer, so Verschiffen sollte angemessen sein.