There are numerous options and gunsmiths to consider. If you have an idea what you want (i.e., 338 Lapua, 338 Edge, etc) do some research on the net and call some gunsmiths and see what they recommend. Do some research and compare prices. Alternatively, you can have a spec long range rig as good as any from PGW - the Timberwolf in 338 Lapua is a dream LR rig, no question.
I started with the factory MLR 338 Lapua to do some testing and confirm it was what "I thought" it should be. After putting a full summer behind the trigger, I then went ahead and sourced all the custom components myself to save $$ (if that matters 2u, it did for me) and to ensure I got everything exactly to my specification and the rifles intended use - a 13.5 lbs long range boomer in 338 Lapua that will make extreme long range precision shots, while not being too cumbersome or heavy to throw in my Eberlestock pack and do some serious hiking/hunting.
I had 'Guntech' build it on my MLR 338 LM action, and after selling the original factory components, I am into it for a bit more than 50% of what a comparable full custom would cost. And it will hang with any of them, rest assured.