What to do????

I thought I was out of the woods with mischievious Kaipo and climbing out of his crib, but a couple weeks ago he started doing it again. Now everytime he wakes up, he gets out of his bed, with no problem or injury (thank goodness). On top of that, he has also figured out how to undo the safety knob covers. So not only is he out of his bed, but he is also out of his room. Which at nap time is no big deal, but at all hours of the night and early morning, not soo good. Mostly because I don't want him roaming the house while the rest of us are asleep, getting into trouble or even worse something potentially dangerous. It wouldn't bother me so much if he was just out of bed at 5:30-6am, as long as he stays in his room and plays, so at least I don't have to get up that early (since quinn has already left for work).
So I was wondering if anyone has seen any other kinds of knob covers besides the brand Safety !st, which come as two seperate pieces that snap together. I know with Ame I had some covers that were one piece and just slid on the door. Unfortunately, I don't have them any more. I have searched high and low, but only find the same brand every where I go. If anyone has seen or knows where to get the one piece covers PLEASE let me know.