I recently found material that claims to withstand high temperatures, up to 160C. It's called Greentec Pro: https://www.extrudr.com/en/products/.../?material=134. Biodegradable, easy to print. I have couple of rolls and it truly easy to print, kinda like printing PLA. Also I tested a part in oven at 120C and although it did get bit softer, it didn't malform like PETG, ABS and PLA did.It's bit more expensive than PLA, but not bad.