Can't find good plastic back up light lenses for '63

[JennChen]

So I thought I was lucky to find these back up light lenses (and on sale to boot!) since the ones that came on my car were one that's basically shattered in place, and the other is broken off with only plastic bits around the edge. The light bulbs, wiring and assembly are perfectly fine, so I don't need those replaced.
https://www.dearbornclassics.com/back-u ... -1963.html

So I ordered two from Dearborn Classics in Dec 2017. And they were on back order at the time. And then the projected ship date kept getting pushed, and pushed. So when I called about the order, the operator told me those had been discontinued and they didn't have any in stock.

I only need the clear plastic pieces, not the whole assembly. I've been looking on ebay, but I usually just find the assembly with old cracked plastic lenses, or no plastic at all.
Any thoughts or direction on where I can find these?? I don't need FoMoCo stamping or anything, I just want to have the original look.

Thank you!!!
Jenn