I dont deal with EastMall or the Riva, but I believe it is EastMall's product.
They are not the manufacturer, (separate companies) but the owner of each company could be the same person.
It is along the lines of the Janty/Joye eGo.
Janty designed it, but Joye manufacturers it.
The manufacturing of the eGo probably consists of 5+ different companies.
Metal fab, charger, internal batt, atomizer, box etc.
Dealing with manufacturer's, I know that china is smart when it comes to production.
They only make what is already sold or purchased (to a point)
They dont really stock up on items.
They move their manpower around to various jobs to get the job done.
Eastmall probably only stocks what they sell in a week or a month.
IMHO and XP