Rifle Scopes Adjustable scope mounts?

[MRc00per]

So I've been looking around and noticed the big name in the adjustable mount world on every forum I read is the Ivey mounts. I went to search for them and they are no where to be found. The website isn't working and no one is selling them. Are they out of business? Is there a new name in the industry that I haven't found yet? I'm familiar with the Era-tac model which I'm not entirely against, just exploring my options. This is for a 300 win mag