TIKKA has a factory option for a gun with a chassis system. Their TSR-1, which is a T3 in a MCrees chassis of a newer design.
Or grab a factory T3 CTR and put it in your chassis of choice, like an XLR Industries, which I personally like better than any MCrees I have tried, though I have not tried the newest/latest MCrees, but the XLR is a very nice rig.
I would go that route LONG before I went the custom gunsmith route.
Then top with optic of choice, and rock on.
This is my XLR and it is a very comfortable rig: