The aluminum louvers will be unavailable until OGTS gets someone to make them. He has sent the plans to a local sheet metal place. The guy in Europe who used to make them for OGTS is in failing health and can't make them anymore. Gil "should" still have some of the side window louvers for fixed windows, according to a conversation I had with him about 3 weeks ago. I STRONGLY suggest you buy them NOW if they are available, the new maker of them might not get the first batch right.
Rear louvers are really hard to find at the moment. I'm extremely well connected and even I couldn't find any new ones anywhere. I had to buy a dusty, scratched, 25 year old set of used ones from Opels Unlimited that he had on one of his cars long ago. Had to have them blasted and powdercoated.
Disregard the availability of stuff on OGTS's website, he doesn't update it too often. Always call him for the hard to find or unavailable stuff.