I can't believe I'm saying this... but you can use my store to store shuttle driver
I have a parts store in Sterling right by Dulles (no, we don't sell many Subaru parts... don't flood me with PMs) and one in Alexandria right by... something, I can't remember. Some Metro station.
Either way, shuttle goes by there twice a day, if you catch a ride just buy the driver lunch or bring us donuts or something. Make it special.
If you can wait for Saturday, I can just take you there myself. Not in my Forester though.