Does such a thing exist? Anyone ever see one?

I doubt you'll have much luck scouring the used market for one, but I'd be surprised if they hadn't made one at some point.  None that I remember in the 8-9 years I've frequented this forum, but only a small percentage of the instruments they make ever find their way onto the pages here.  
 
I have a short/medium scale custom brewing in my head.  I need to play a few 30's vs 32's to nail down my preferences, then start saving.