Just a WAG, but sounds to me like Mr. Brockman could be a relatively small custom gunsmith in spite of his very well done web page. As is the case with some very good craftsmen, he could be doing most of the work himself as well as manning the office and something could be preventing personal communication (illness, etc.).
The "city" of Gooding had a population of 3567 in 2010, so I'd give the chamber of commerce a call and see if they might be able to shed some light or know how to contact Mr. Brockman.
COC phone number is 208-358-3038
Good luck.
Regards,
hm