Mr H
Banana'd
He's got limited store hours (mainly Friday and Saturday morning), but I've had pretty good luck with Otto's Police Supply ( http://www.ottospolicesupply.com/ ). Just contact him over his website or call and he'll handle everything from his end whether the shop is open or not. I've also used Barts, and A&D Pawn and Firearms and an old friend who lives on the Eastern shore (for unregulated long guns only). Otto's was , at least fairly recently charging $45 + $10 to MSP. You'll have to verify that is still the current charge
Last I was aware, A&D--though I normally like dealing with them--is adamantly non-timely-release.