Aedvines customizes existing classical guitars into Semi Acoustic Basses. The old necks are taken off and new bass necks are mounted on. Also the backs are removed and the tops are reinforced with solid bars of all kinds of woods. The backs are mounted back on afterwards. Each bass has its own distinctive sound because of those changes.
All basses are either for sale or sold. On the contact page you can ask prices and availability.
In the gallery you can check the models until now. And there are a couple of demo videos. Update 10-08-2016: I now also show some solid body electric basses and guitars on this site. They are in the tab "Solid Body Guitars&Basses", and "Quintar Designs". Check out the Electric Double Bass "D Sigaar".