LED Lens Cover for 59mmx39mm Panel

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/5xYnNhoSPqc

The LED Panels I ordered from:

http://www.ebay.com/itm/301032417732?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

were larger than the original lens cover this is based on. I revised it to fit the panels I got (59mm x 39mm)

EDIT: I printed this in clear PETG, which is supposed to have good heat tolerance.. but this thing warped pretty badly when I was printing some ABS in an