The kit looks real nice. I def like the rear pod better than the 5.1 pod. I think it may be a bit heavier than the 5.1 pod due to all the aluminum.
You can pre-order at tqhobbies.com
Like Paul said the price should around $250.00 which would be cheaper than the price of the T-Plate version which usually sells for $269.00 retail.
Serpent says they will be available mid December but realistically probably around January sometime.