Most customs currently available now and if you let a smith measure any action he can cut future barrels as well so long as he doesn’t throw out his notes.
As stated above, most of the well known receiver manufacturers have tolerances tight enough for shouldered prefits.
Zermatt gives you multiple options available with shouldered TL3 or shouldered Origin or Barrel Nut and use any barrel cut for a Savage. A TL3 shouldered barrel (many for sale weekly) will fit in an Origin WITH a Hunts Long Range recoil lug swap.