Does such a thing exist? I have a few AB batteries but recently aquired a JVC EBG camcorder with a V mount connection on the back, can one of you experts please advise me what I should use? :)

Is this ideal?

http://www.ebay.com/itm/V-Mount-to-Gold-Mount-Battery-Adapter-V-Mount-to-Gold-Mount-Converter-Plate-/270822488094?pt=Camera_Cables_Cords&hash=item3f0e47381e

Sure those work. Or if you permanently want to use AB batteries you can just replace the battery plate :)

Here's one at B&H:

Anton Bauer QR-A200 Gold Mount Battery Plate QR-A200 B&H Photo

Why does that say 'Not for use on cameras' Glen in the photo?