Up here in Ohio, Menards carries the clear plastic panels along with all the other metal and trims you need for a pole barn project. Not sure if you have them in your area though.
HI Cat, great thread and nice project. I love how you spaced your double trusses a little further out (around me in Ohio the norm is 4' or 8'), and I like how you stood the 2x6 purlins vertical. A lot more strength over the span. How did you attach them to the truss though? I couldn't tell if you used Simpson type straps or if they were toe nailed.