he's a hard working man,  puts in a lot of hours making good stuff for us.   I'd suggest emailing him.   A lot of the work he does requires a lot of concentration and answering the phone at random times can be a distraction   I know other busy 'smiths and similar work guys who don't take calls in the shop.   when I need to actually talk to discuss a project I usually use email to find the appropriate time to call and I try to keep the call as short and to the point as possible out of respect, and not to waste their time with chit-chat.

If you call a Dr or a Lawyer you'll probably find a charge on your next bill (or its built in)

Hi Fitz, Tried all that. Will wait him out. I have done business with him in the past.  I thought he might be away. Thanks, john

Thanks guys, made contact. He says no vacation, ever! john

Alternately; Busier than a one legged man in an a$$ kicking contest.