There are two that I know of in Portland, OR but I can't submit them. Says there's an error with my login
I know of 3 stores in my area that are not on the list (not sure about "certified")
e-liquid.com/
1637 Woodruff Rd Greenville, SC 29615
(800) 485-8716
and
Vapor Realm (only has Facebook presence at the moment)
https://www.facebook.com/vaporrealm
217-D West Wade Hampton Blvd, Greer, South Carolina 29650(864) 879-0773
and then there is (which is also DIY supplier)
NicVape
By Email: customerservice@nicvape.com
By Phone: 864-848-7833
Store Address: 107 Corporate Drive, Spartanburg, South Carolina 29303
I thought this might be helpful, there may actually be more, but these 3 I'm certain of