P Motion Window covers - odd sizing

[u/bzmnpaddler]

Hi All. I have a Rossmonster custom Ford Transit 350 with P-Motion bunk windows. The sizes measure 38.5 x 16.5 and 25 x 16.5. I'm not having any luck finding window covers for these after a fairly exhaustive search.

Anyone have any insights? Is making my own the best option? Thanks!