I've used that too - different brand, same profile. Its a good product. Stiffer than 5v actually, and (locally) a thicker guage, so more expensive. No complaints on quality.In searching for 5v, one supply store suggested a local manufacturer. Did some more research think I'm going with
https://metallionroofingandsiding.com/metal-profile/magna-rib/
They offer it in metal and poly so Im thinking one or two poly for light. The profile should be an easy install and it's for direct install on purlins.
Thanks all!