Doug's Hobby Shop are the guys I deal with on a regular basis, and whom I would highly recommend... They are located in Maryland and provide fast courteous service. If they don't have what you are looking for, they can get it within a few days. You can locate them on line at www.dougshobby.com. I would recommend calling their toll free number and ask for Jim Moran. He is the owner/operator... Hope this helps.

I have had luck getting them from Quantum Models at Quantummodels.com. Free shipping for orders over $100.

You might want to take a look here. http://www.goldenstaterc.com/
I've ordered from them and they were very good to deal with. Very fast shipping and good email response.