Terrarium Locks

[clegault]

Last weekend my oldest female leo decided to go on an adventure (no one was home at the time) she escaped from her big 36 x 18 x 18 terrarium that has sliding glass doors. I have NO idea if someone knocked the door without knowing allowing her to escape (I also dont know how long she was out of the tank) or if she managed to open it all by herself. It was feeding time and Cleo is always out the second she knows there is food coming, anyways she wasnt in the tank and after a frantic search (I have two austrailian shepards that run loose all the time) we finally found her behind the tv cold and a little shocky. Somehow the door was closed behind her which remains a mystery. Cleo is now doing well but I do not want this to happen again and was wondering if anyone knows where you can get the display case locks like what you see in electronics stores and such... also I am in Canada.
Thanks for any suggestions!