I was looking into 3" flush valve other OEMs. There is a Fluid Master 540AKR but I wondered about the Korky line. I found nothing other than a 3" flapper so I emailed CS. They said that they have a 5030 carried by True Value Hardware and gave me a SKU number. No product or SKU at True Value Hardware's site and in fact there no 5030 at the the Korky site either. Could hardly find it by Googling which is actually a 5030BP. Why is it so hard to find? Are 3" flush valves so new to the industry that nobody stocks them yet?