I'm looking for replacement gas caps for my 990. I will be racing in dust and sand and I want to mitigate the risk of breaking a key or not being able to open a gas cap during a long race. I have had an experience before where after a crash, sand made it's way into the key holes making it impossible to insert a key. Ideally this would be simple plastic caps and not fancy metal on metal billet screw type. Any suggestions?