Shapeways for Convertible Latch and '66 Headlight Adjusters

I wonder how they would hold up in the heat down here. The last nylon ones I put on here, where they've seen 125degree heat in the shade and much hotter in the sun, worked for a summer, the heat bent them out and they broke between the two bolts/rivets. 3 sets in 5 years and gave up getting more from a different vendor.
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Been using speaker wire and twisting it around the stops and the top frame to keep the top down for years as a result.

I've toyed with the idea of making a cad diagram and 3d printing some with carbon fiber media.

What is the strength difference between Natural, Processed, and Premium?

Are the black ones stronger than the white ones?