There's gotta be a service that does this, though.

With some searching around, I found this place in Oklahoma: https://skullcleaning.com/

They mainly deal with hunting trophies but their price list covers almost every vertebrate animal you could think of: https://skullcleaning.com/services/skull-cleaning-pricelist/

"Human" is conspicuously absent, of course, but then you go to the "Skeletal Articulation" page and the first photo is of a fucking Centaur lmfao: https://skullcleaning.com/services/skeleton-articulation/

I feel like if you called up and asked, you at leastwouldn't get a hard "no". I'd bet good money that they've done work on human cadavers before.