If you are even a with a little bit of aptitude you can put together your own at home! If you want to anyways.
Most of the top actions now a days are all prefit capable, and most manufacturers sell prefit barrels for these actions.
I went this route with a 6.5 CM a few years back. Had a rem 700 short action chassis already, bought a barrel when I ran across one on sale, then 4 months later bought the action that I had the barrel spun up for. Yea with a barrel nut, but they really don't take away anything from the ability of the rifle to perform.
In fact I set my own headspace a tad tighter so I did not have to pre-shoot my new brass to fit the chamber. Just used the new brass with a loaded dummy to set the headspace. Yes I still checked with a no go gauge and all was good. Was able to load up with new brass and had problems with it and didn't have to worry about shooting it all in my chamber before hand.
Once you have the action, barrel, slap it in the chassis, and slap on your scope of choice and go to the range.
I even scribed my barrel nut and barrel to the action so when I wanted to remove the barrel for deep cleaning I could put things back to how I had them and had very little re zeroing of the scope after wards.
Really not as hard as it seems as the smith sets the barrel up already to the action. I truly am surprised that not many are using this route yet.
You pay about $500-$600 extra for a smith to spin up a barrel for the action if you go the smith route, and that works out to a bit of consumables for shooting with. Plus most smith's prefer you buy the action and barrel from them, or they charge a crazy extra fee, if they even choose to go that route, as some won't even entertain that for you. Lets you buy the parts as you can if you have to save up over a few months.