If anyone is so inclined, there is a very nice Jerzy Drozd double-neck (5 string fretted/fretless) at Bass Northwest.  
http://www.bassnw.com/Used%20Basses/jerzy_drozd_mastery_custom_doubleneck_5.htm
I've seen these JD basses around, but can't vouch for their sound/craftsmanship. Pretty cool inlay, though........

I don't know if I'd call it inexpensive!! BUT it sure does look sweet!

I've done a little research on these basses and they are built in Spain and are all extremely nice! This is just a minor example of what they can do.