There is an Ebay seller from Sri Lanka that makes plastic bolsters, links, pins and pockets. Fairly cheap, but takes two weeks to get them. It looks like they are 3D printed.
So I ordered some.
Started to make a short string of disconnects. The bolster is thin, but once it is glued and pinned on, it is very sturdy. And the Bachmann small wheels I ordered from Robby fit perfectly.
What they hay, Huh? Something to do.