I would think that such things are special and only manufactured for specific products.
There are metal profiles to buy and then you drill the holes you need.
We call them "håljärn" in our trade as door fitters. I'm almost certain I saw them at Hornbach recently, but they are only in a few major cities. Look up a local door company, they usually have plenty of håljärn.
Both Hornbach and Bauhaus have such profiles in-store.
Proper building merchants like Optimera can order it upon request.
Rinkaby Rör has it in their webshop.
Do you have any link to Bauhaus or Rinkaby Rör? I can't find it....