"I've considered custom tailoring, though I've not gone that route yet...the additional cost is tremendous."
Outside the US (S. America, and in Med. Europe), you can more easily and cheaply buy something that's larger than you'd normally wear and then bring it to a seamstress, having it fit to your size for cheap ($20 or less). The younger people in this kind of business charge US prices but older people with more experience will do it for cheap.