Shilen Barrel.
I did... a #1V in .220 Swift.
Yeah... I like my workmanship.
A weekend.
Now... knowing that the above answer is completely useless to you and you're looking for a good #1 smith... I recommend
McGowen Precision for both the barrel and the gunsmithing. They'll do a first class job on your #1 with a very fair price and good turnaround time. They make a premium barrel too... so it's a one-stop-shop deal.