Yes there is, or maybe was, such a store. Tennessee Guns, sometimes called Tennessee Guns International is/was an importer of former Communist block guns and parts since the mid-90's, but got in some trouble with the ATF in 1999 over the importation of some un-modified AK-74 parts or guns. Charles Jones, the (former?) owner pled guilty to importation by false or misleading statements and was sentenced to probation and fined in March of this year. At one time, they imported many Mosin rifles (stamped "TGI Importers") and have specialized in PSL's and modified AK's for several years now. Their website, tnguns.com is still online, but I have no idea if they are still in business or if so, who is running the business as Jones is now prohibited from owning firearms as a convicted felon. They are/were located outside of Knoxville, in Louisville, Tennessee.