I've been trying for a year now, and still trying to come up with one that I'm happy with before offering it for sale.
If I'm not mistaken Waverly Street Dave will build you one that won't get sold out from under you if you negotiate with him. Dave?
hrm... that eliminates impulse UAS buying ha ha
I'd kinda like to have a soprano version, does he or anyone else make one that small?
I'll keep an eye on his site and in the next month or so, contact him when I'm ready otherwise!
Two new ones this afternoon: http://www.wsukes.com/forsale.html