Looking to build a bolt action 6.8 rifle. Probably going to start with a Remington 700 SA in 223 and have the bolt face opened up. The ifle will be set up as follows:

Remington 700 SA
20", 1 in 11" Twist, SPC-II Chamber Sporter Contour Barrel
McMillan Compact Stock
Leupold VX-3 1.75-6x32 Scope
Talley LW Low Mounts

What I am stuck on is what barrel maker to use as well as what to do for the magazine box and follower. I also would need a good gunsmith to do the work and hopefully cerakote the barreled action. Any suggestions on thses questions?