This is not a good alternative, but it is an alternative. http://www.amazon.com/Electric-Acous...ic+bass+guitar
Since you want fretless, you could remove the frets. The worst you'll do is wreck a $70 bass. I had one. My biggest objection was the frets, which you don't want. Oddly enough, it did not sound bad when amplified. The neck was adequate for messing around the house. For playing out while singing, not so much.
G-K club # 602, Short Scale Bass Club #159,Squier Jaguar SS Bass # 15, Trinity House Mudslinger, OFBPOAC #23