Found an interesting tool for storing descriptor for a multisig wallet on metal plates.
Namely SeedHammer II. The price is less than a kay,
all in all $ 499.00 
for tool itself plus $79 metal plates.
Well, the plates aren’t a problem. You can easily source them yourself.
Hurry up, because the updated version, SeedHammer II OG Edition, which they’re currently working on, will cost $3,500.
The software is open source.
What the tool does it simply bums bums… bums… and shazam!
P.S. The price may be quite affordable for multiple parties sharing the multisig wallet, and even for individuals who don’t mind the cost. It also looks like engraving the regular SEED phrase would be no problem for this device.