Hi, I'm looking for the same thing, or at least the guide rails.....
thanks
Gary Guinn

Wings and Wheels has them - http://www.wingsandwheels.com/page37.htm

US$76 for megaplex and US$122 for polycarbonate. The cheaper rails are
actually recommended because they're not as strong - Do you want your
guide rail to break? or your canopy?

Tony V.