Abby82
I got the tools in a local security store, but you can order online in Amazon, like Laura said. The local store sold cameras, motion sensors, and other tools to keep your home secured. They never asked why I made that purchase when I got the set of lockpicks. You could try it out if you really want some relief for yourself, like even if you unlock one side of thighbands, it may be easier for you to manage.
You could even replace the padlock that looks similar on the outside, so if your parents are away, you could just open up yourself. But if they want to unlock you, then be sure to switch the padlocks back to their padlocks or they'll wonder why their key doesn't work. Whatever you decide, make sure you do not close a padlock that you picked open, cuz there is a chance you may not be able to pick it open again while is it off of your belt or thighbands. I just figured since you can move your thighs, it'd be easier to see the keyhole and start lockpicking those chains to slip them off. Hope all goes well.
