The tank on US EBAY has the tank cap on the centre line of the tank with the breather between the tank cap and the mounting bolt whch makes it a VA/VB125, VA, VR or V75 (not sure if the VA360 was the same as the 250). The lack of strips makes identification difficult although it has two fuel tap outlets so is not a VA/VB125 tank (unless someone has been game enough to add the second tap
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The VB series had the cap offset to the right of the centre line and the breather was offset to the left and beside the cap. The VB250-360 series tanks are 20mm longer than the VR, VA V75 tanks (I just measured the ones in the shed).
I appreciate the help and please keep your eye out but I would prefer a VB series tank if possible.