Can't find jackets (suits, blazers) that fit redux

I've been searching for about a year and a half, and still no luck (at thrifts, curated vintage, eBay, new RTW). My problem is mostly that my shoulders are much larger than expected for my small chest size - 19" when my chest is 39" at the largest and 37" in the middle. I'll add some more details and pictures in replies - sorry for the wall of text. Any tips would be hugely appreciated.