GenV owners are in luck. These caps are available for purchase right away, but only in silver.
I don't have a confirmed price on these, but from my conversations with the vendor i'm sure they'll be an equivilant price to the GenIV caps.
$77ea delivered to your door. Awaiting confirmation
If you are keen, please state your SOLID interest below and we can get the ball rolling.
http://www.jprova.co.jp/products/accesories/4e3ukb0000000ihx.html