Bought a slab of 3/4" UHMW plastic and probably have enough leftover for another 10 canopy guides. It is easy to cut with a saw, then just sand it smooth.
Mount it with 2 countersunk screws. I created a plate with two nutplates on it to capture the screws, since there is no way to get a wrench up inside the roll bar to hold the nuts as you tighten the screws.
Message me your address and I'll mail you some plastic.