I'd like to add a bit of security to the sliding door of my transit. Ideally cheap as possible (within reason). I want it high up to stop the door being peeled from the top. There's nothing of value inside it but it's been broken into before and i'd like to prevent it, which is why I don't want to go down the expensive lock route. I've got one of those round padlock and hasps lying around, but I don't think it would clear the sliding door. I've got one of these on the back doors though. I've seen those rectangular ones but I hear they're easy to break into. What other options do I have?