Are you building a mh reflector?
I may still have plans for a diy reflector that we made from the solar tube material you buy at Lowes or Home Depot.
I can't find the actual drawing on the internet, but I did down load it a few years ago and took it to Office Depot and had them print out a full scale copy.
You would need some mild diy skills along with tin snips, a drill and pop rivet gun.
I as the rock reflectors and could not find. or rather couldn't find ones that would suit me I have searched everywhere where only it is possible. It was not as easy as I wanted. especially not if I wanted to pick up on the similarity of what I already have on this website. what would they exactly were and it seems desirable that only they were as single unit, it certainly is an art.