Here are some links with some options on the cover.
Anti-Jump Proof
I was trying to attach my photos that I posted in these other ones, didn't even get the permalink - sorry.
Lorraine's Rebuilding of 125 gal Tank The 90 gallon Road Trip
I can mail you some netting if you decide you want to do that, just let me know what size top you have, and where to mail it to.
Lorraine