shutterbug, although the title of your post is Prodigy, your question seems to be focused on the Kr8.
You can learn more about it in the
KR808D-1 Model Specific Discussion subforum.
This model is sold by myriad suppliers and under several brand names, including: PureSmoker (Ace, and which manufactures and sells the Prodigy), NHaler (KR808D-1), Vapor4Life (Vapor King), CigEasy (Easy), GoodProphets (VapoRite), LeCig (D1), and VaporKings (KR808D-1). Those are just the ones I've dealt with. All of them are easy to find on Google and many maintain ECF Approved Suppliers subforums here.
In a separate ATE post, you asked:
I see mentions of the silver bullet quite often. What are they exactly and are they for any type of e-cig?
The Silver Bullet is sold by
AltSmoke, which maintains an
ECF Approved Suppliers subforum here.
The Order of the Silver Bullet subforum (and Social Group) is another good place to learn more about it.
Prior to asking further questions like these in the Ask the Experts forum, I recommend you read the WWV Illustrated Guide linked in my signature. I believe that it will answer many such questions and point you to resources for answering the others.