Kwaiken is a pretty loosely defined term. Could you be more specific on what you want Boss Hog to make?
http://images.google.com/images?oe=UTF-8&sourceid=navclient&gfns=1&q=kwaiken
I've seen the term applied to everything from short knives much like the Skeleton Key and Rat's Tail (barely out of range for calling them kiridashi) up to 10" or more blades in fairly varied shapes. One can see lots of variety:
-- short to long blades, steels from excellent hand-forged to cast pot metal
-- straight and curved blades
-- bellied and American tanto tips
-- handles of just about anything: wrapped (traditional
tsukamaki), micarta scales, wood, rubberish stuff, etc.
IMHO the "state of the art" (emphasis on Art) kwaiken are those of Scott Slobodian and Wally Hayes. Except of course those of the 15th and 16th century Japanese master swordsmiths.

For utility use, I'd approach Murray Carter to make me one, given his training in Japan and total immersion into the craft.