I have a set of serial # unused plans for a zenith 750. I also have all the aluminum needed to build the complete air frame in 4 x 12 ft sheets still with the original pvc protective film. I also have the required Longitudinal extrusions for the air frame. I purchased the aluminum before the tariffs went into affect so I can pass those savings on to a lucky buyer. Located near Helena Montana. Make reasonable offer! Westfirmfg@gmail.com