High Temp Plastic Candy Molds (Hard Candy)

Is there anyone who has information on what type of material I can use for candy mold making? The plastic has to be able to handle temperatures of 300-310* F. I understand that for chocolate molds we don't use the high temp. But the type of candy molds that we are interested in making is for hard sugar based candy. I currently use a thermoforming machine to make soap and chocolate molds.
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