You're right, with bracket there seems to be not much choice atm. I ordered one last year [1] which also took forever to arrive (over a month). I normally don't care to much about delivery times though, I'm more concerned with excessive postage/handling costs 😀
The one I have I'm currently using in a 386DX built with a 512MB SD card. Works really well, BIOS detects it etc.
Maybe you can go for one without the bracket and find another way to mount it. I know that StarTech sells a bunch of different mounting brackets. I assume that the SD/IDE adaptors without bracket do conform to some standard layout, i.e. the positions of the screw holes etc...
https://www.startech.com/HDD/Brackets/
[1]
