You might try Dan Pedersen at the Well Sports Store in Prescott, Arizona, 928-445-3655. He makes excellent cut-rifled barrels, which can duplicate any contour you want, and also does excellent rebores.
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<br>I just had him rebarrel a Model 70 in 7mm STW to .300 H&H, and he also talked me into doing a rebore on the 7mm STW, to the .358 Shooting Times Alaskan. Both barrels are very accurate and drop right into the same stock, so with my barrel vise I now have a switch-barrel M70. He should be able to do a great job on your .30-06/.338-06 change; reboring costs less than $250.
