You can check to see if the gunsmith has a 01 FFL here-just have him give you the number and be sure to ship to address on the FFL listed here;
https://www.atfonline.gov/fflezcheck/as to shipping,for unlicensed individual-long guns can go common carrier,or USPS.
For handguns,again for unlicensed individuals,they must go common carrier not USPS,unless you have a FFL(UPS,FedEx-they require next day to to employee theft).Don't be surprised if you gun is returned after repair USPS thou,happens all the time.
http://www.atf.gov/firearms/faq/unlicensed-persons.html