Have you been on to the Accessories page to have a look at the waterproof cases we have to offer?
You can choose which type of case you would prefer from the 3 options available. 2 of the cases are for the Olfi one.five (hinge left and hinge right) and the other case option is for the Olfi original waterproof case. The one which is suitable for modifying says so, under the listing.
If you are having problems navigating/understanding this waterproof case product page, please let me know and we will revisit it. We my have written it, but if its not understandable/clear then it probably needs adjusting slightly.