Ron,
I made stainless screens for all my car's apertures, a couple of years ago.
That mesh was from Racer Parts Wholesale. The reason that I mention this, is that my first effort was quashed by the mesh turning to RUST after a few months of driving, washing, etc. I raised HOLY HELL with RPW, and they sent me new mesh, but that didn't compensate me for the time involved, nor the wounds incurred. I would suggest "test weathering" the mesh, BEFORE putting a lot of time and effort into making panels.
I would imagine that Pegasus and RPW buy from the same supplier. BTW, the second piece of mesh was fine, and still is.
I made gaskets for my panels out of razor slit, 1/4" vacuum line, glued into place with black weatherstrip adhesive. Easily removed, if necessary.
A search will turn up photos that I posted, showing the panels and gaskets.
Bill