eBay has something that they call a eight stringed lute backed bouzouki liked instrument" or something like that. Its from a dealer, and they regularly post these instruments, made in Pakistan, I understand. I can't say if it is a real instrument. The auction house is:

http://www.ebay.com

I just posted to the thread about eight string guitars with a real interesting site:

http://www.mandolincafe.com

Everything that any sane person would ever want to know about mandolins, citterns, mandolas, bouzoukium, etc...