I too have a Simmons Deerfield scope that's 7 years old or so, although I'm not sure it's that model. I also lost the rubber eye piece ring so have been using it for the past several years without it. If anyone knows where to get a replacement I'd like to order one too.
To my surprise this is one of my favorite scopes. It's got surprisingly good glass for the price, has always held zero even through a ton of abuse, and it tracks pretty well too. I wish all scopes were as good as this scope has been to me, and if I'd known it was going to be as good as it was, I'd have bought 10 of them.