Most low-end 3D filament printers can print in either PLA, ABS, or even
nylon. PLA prints are known to distort in a hot car. ABS is extruded at
around 250C. I think nylon is a bit higher. I would think that ABS would
work well. There are now some low-ish cost (like under $3000)
stereo-lithography printers available that print by scanning a liquid resin
with a laser. Some of those resins are good for higher temperatures. The low
end resins have a glass transition temperature of around 100C.
Another possibility is to make a mold and cast the parts out of epoxy.
Epoxies that can handle over 400C are available.
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