The build deck is also redesigned:
12:22:
Here is a clone of it on FT:
$2.97 Replacement Rebuildable RBA Plus Coil Head for SUBTANK Mini Clearomizer - 0.5ohm at FastTech - Worldwide Free Shipping
They don't have the new minis on FT yet that I'm aware of.
from what I've read, the rba clones are junk. You're probably better off buying an authentic for a bit more money.