Just go to the Alibaba contact page, contact them through it. I'll warn you, your going to be paying roughly $25-$30 in shipping and fees for a small order, 2 or 3 pieces. Unfortunately they only offer DHL shipping which is nice and fast but expensive. Two SZX mods with matching
rda are going to run you somewhere near $70. Depending on who you manage to hook up with (they have multiple sales reps) they may enforce a 3 piece minimum. Sadly they also have a fairly low response rating 40-80%.
the above is not unique to Kindbright, pretty much every factory rep I've dealt with is the same, sometimes they reply, sometimes they don't so keep bugging them. just be prepared for the shipping +fees. If you can buy the items you want from
fasttech, or 3Fvape you'll be much better off. In the case of the Subzero X mods sadly I don't know anyplace that actually sells them other then direct.
Maybe someone else here knows. Also they just call it SubzeroX
mod kit, Copper, Brass, SS.
Contact Information for Shenzhen Kindbright Technology Limited