Dropped the tablet several times. Wondering if the case can be chang

Hello my name is Jason and I have a IRULU EXPRO. I have dropped it several times and now the case needs to be replaced. Not fitting together flush at the seams and not being to computer smart I really don't want to just try to click it back together like I'm sure is what could be done. Anyways just wanting to no if they sell shells for these and if so different color option's. Any help will greatly be appreciated. Thanks again