Yeah they are made by the same company that makes the evolution engine sold at HorizonHobby. Most hobbies stores do not carry them, when I was in TN there was a hobby store that sold a lot of the evolution props and they were priced cheaper than the others. So that is how I started flying with the evolution props and like them. I think the biggest they sell is a 16x6

Here is a link

[link]http://search.horizonhobby.com/index.jsp?sid=1332D4C2CF22&Ne=500&N=603&Ntt=prop[/link]

Parts: Ebay,RCU(Buy Sell Section),RCGroup-( put a "s" on the end), Amazon, Craigslist

This plane has been discontinued for about 3 years now I think so Towerhobbies no longer has parts.