The 501v2 and 502v2 are both available and the distributor is working on stocking these models. Silver 502v2 is in-stock. The 501v2 is $11,495, the 502v2 is $12,795.
Also, upgraded boards will be available for people who want to move from the original 501 and 502. This is not a vicious process and just needs to be coordinated through your dealer.