Hi. I bought two sets in a hurry and just used the first set that arrived. I paid $550. Brand new from EDR Performance. $500.
If you're implying that they're not from EDR, they are for sure. They were building a race bike and didn't follow through with finishing it. So they had these available on Ebay, where I got them. I have the message trail with them and am happy to show. My guess is that they never did mass production of them, or they just do make them on an individual basis. This is often the case with these specialty parts.
What do you need to know? I can ask them in Ebay, or write / call them. Let me look in my ebay history and see if the original description is captured somewhere.
The listing is old and deleted, but here is their Ebay storefront. They have lots of stuff. https://www.ebay.com/str/edrperformanceraceshop