Here is an idea that is cheap, it's not really a chastity belt but it's a way you locking yourself up similar to chastity.
You will need this style belt
https://cdn.shopify.com/s/files/1/02...g?v=1588736157
And some really tight high waisted shorts/jeans put on the shorts then the belt make sure the belt is above your hips and tight enough not to go past them but not so tight where you could hurt yourself. Then take a lock and line up the holes on the tongue of the belt and the body of the belt and put a small lock through them then *CLICK* you are locked in your shorts. For obvious reasons it can be long term chastity but you could have fun with it