The problem with terms in common usage is that meaning is determined by usage, not a dictionary or other "authority." Examine search results for "custom" at one of the gun auction sites and you will quickly realize that "custom" to at least 8 of 10 users refers to a firearm that most here might call "buggered." Given the expectations set by experience, imagine a personal ad which read "Custom SWF seeks SWM for LTR." I suspect only an optimist might imagine someone as attractive as a fat girl that does not sweat much!
"Bespoke" or "Best" (or the two words appearing in close descriptive proximity) might come closer to the mark that SDH wishes to delineate, but probably only because rare usage in America has yet to corrupt connotation. Salvation probably lies in Shakespeare's several well known comments about a rose.
As an alternative, we may appeal to fine art in the vernacular of Jeff Foxworthy. If the maker dies and this fact is sufficient to cause a rifle jump in value, it might be custom.
