If you use this link you will save $10 https://shootingtargets7.com/?ref=RU04MDZGcEl3RTA9 I got some precision gongs from them and some brackets to make my own gong rack. It is a vet owned company as well.
I bought a couple from the eBay link as well. They are here but I was shooting paper and function testing all day yesterday so haven't gotten to use them yet.