I was in the exact same position as you earlier this year Red. Bought a 530ZVM chain off ebay, but it didn't come with a soft-link. Went to the local Yam dealer who gave me the current ZVM-X link (marked as 50VX ZJ), which was too big.
Went back to the dealer with old and new chains and links. They dug around in the spares box and found 2 that did fit, both old stock. They were labelled as ZVM and ZVM2.
I believe that one of these will do you:
http://www.wemoto.com/parts/picture/bc-3118698/
http://www.wemoto.com/parts/picture/bc-3112398/
http://www.wemoto.com/parts/picture/bc-3112698zvm/
Good luck
Went back to the dealer with old and new chains and links. They dug around in the spares box and found 2 that did fit, both old stock. They were labelled as ZVM and ZVM2.
I believe that one of these will do you:
http://www.wemoto.com/parts/picture/bc-3118698/
http://www.wemoto.com/parts/picture/bc-3112398/
http://www.wemoto.com/parts/picture/bc-3112698zvm/
Good luck