Yeah, it's too bad we can't get old fixtures and things these days from utility companies. Other than on eBay but the prices, are high.
I had a contact at the power company in my hometown like 5 years ago. He let me dumpster dive for streetlights a few times. Even sold me a brand new in box OVH at their cost and included a lamp and photocontrol. He gave me some used photocontrols too.