It will be more logical to any European to buy even the “boutique” FLEA Yoke and . . .
Wild Stab in the Dark No. 29873 --
Please forgive me if I am off base ... but, I wonder whether something like this could donate a yoke for your needs at low cost - i.e., around $18 US on eBay.com. Let me know if you would like me to post measurements/dimensions. See photos below depicting a mic body kit I sometimes buy on eBay for around $18 US, including shipping. I often install dynamic cartridges as end-address microphones for ham radio operators - hams like how they sorta, almost look like radio station microphones. I figure you could use just the yoke and associated hardware.
Wild Stab in the Dark No. 29874 --
I sorta, almost suspect (i.e, guess) one could fashion a yoke from "angle aluminum" (aluminum bar stock) and secure it to a mic stand with parts from a cannibalized microphone stand or microphone stand adapter. I often amaze myself at what I can do with a big hammer, hack saw, vice, and some aluminum stock. (Shoot, everyone needs at least one VICE to keep life interesting!) But, seriously, seems one could make something easily enough for around $5 US in aluminum, a couple of screws, and a few fender washers. See photos below, depicting a headset I made with a pair of headphones and a mic boom from a Shure Model 512 head worn microphone. I made the boom mount from a few inches of flat aluminum stock with just a hammer, drill, and bit of shrink tubing. It works a treat.
Or, perhaps, not. I am just thinking aloud, which sometimes gets me in trouble! But then, my road to Heck is well paved with all of my good intentions!
James