Retailers and manufactures can't "ban" anything (although they can make them hard to get - COUGH+LG+COUGH)
Also, there is no use in asking a battery retailer what batteries are best for a vape mod, they will not have a clue. Mooch has already done all the work for you.
Consult his
list of battery tests if you are looking for info on a specific battery.
If you just want to know what batteries are decent for vaping,
consult his list of recommended batteries for regulated and unreglated mods, choose which one is right for you and just buy (preferably at one of the stores on Mooch's list of recommended retailers found on his blog's
homepage).
It's also important to note while Samsung and LG do target vaping (that's political), they actually want to get their cells out of the hands of all consumers, not just vapers. These cells are not designed/manufactured for use in anything but to be installed inside power packs with protection circuitry. But they cannot stop you from using these batts in anyway you wish if you can manage to get your hands on them.