Have ordered one each of the G4 sizes to try them out. Obviously an El-cheapo but for the price what the heck?
Will report back on the results when I get them. Looks like it might be a very economical way to convert, not ideal but cheap.
Don't know where they are based but I think it's far, far away. <edit> They are in Hong Kong
G4 - Free Shipping - DealExtreme (http://s.dealextreme.com/search/G4)
Keith