I see lots of KR808D threaded stuff in the sites shown when you select the Forum Suppliers tab at the top of this page.
Just make sure you know the threading before you order stuff - it is not always obvious. I don't know if you're aware that you shouldn't use the low-ohm resistance (DCCs are usually 1.5 ohm) cartos/attys on small batteries (rated < 450 mah) since they are known to draw too much power and will kill (or at least drastically shorten the life of) small batteries.
I have dealt with one supplier (who participates in this forum) who I know carries these :
CropDuster901 eCigs, eCigs, Vaporizers and Supplies His echo line of 1300 mah batts and DCCs are 808 threaded. Tony is very customer-oriented, has good prices, and ships quickly - Some vendor characteristics that are rarer than you might expect.
Happy vaping.