Thanks for the tips everyone. While I do buy some train parts off of ebay, I think I will give one of these train parts dealers a call since I also need to buy one metal sleeve for around the light socket. I'm assuming they will know what I'm talking about. I also need to order led's for the controller and switches. I hope one of these dealers carry an led for the switches, because so far all I can find online is led's for the controller.
Also, I stand corrected. My switches are in fact 720's and not 720a's like my post originally stated.