How close are you to a border?
Have a friend (or even a shop) in PA, VA, or WV order whatever you want. Then drive over there, pick it up, put it in your trunk, bring it home, and use it as intended. This is NOT illegal.
It's not illegal to HAVE or USE hi-caps in MD, it's only illegal for the transfer to take place in the state. Strange but true and even the cops will tell you "that's how we get OURS."