There used to be a wheel shop in Rockville across from Superior Automotive (where I had my SHO maintained after ProTech closed), might still be there. But there are mobile services that can fix if it is not too bad.
EDIT: Can't find the wheel shop, but did notice there is another full service shop there
http://www.ironmikesgarage.com/services/5611 Kraft Drive, Rockville, MD 20852 | 301-881-8442
Superior Auto
http://www.auto-repairsrockville.com/12298 Wilkins Avenue, Rockville, MD, 20852 | (301) 750-2159
Rob is probably still at the front desk, Bob is usually managing the repair services, but both are great to talk to