I am looking to buy some straight - 10" and 30" - Realtrax, but the only place i can find it is ebay. Any other places?

Hi All, As I have mentioned in some other threads, I am new in the hobby and going with O scale. I have purchased a nice MTH freight set with their RealTrax. I am going with a freight yard theme and a before I make the investment for extra I wanted to use the correct type. I am considering...

I have the Realtrax on top of cotton batting and screwed down into Homasote. Still quite noisy. Any chance that Scaletrax would be quieter? I may change, but only if it is significant. ($$$). Thanks.