SWFA scope ring alternatives?

I know that there're some SWFA scope fans out there, myself included. Today's question is about their scope rings. I have had a couple of pairs and like them, but they are pretty dang over-built for air rifles. What I like about them is the side hex bolt that secures the ring to the rail. And for a budget price, they seem like they are good quality. I've never had any scope rings marks left on my scopes with these rings. Are there other brands out there that use the same type of bolt head, but with 2 pairs of top screws instead of 3?