I use a Seido clip holster because it's much more utilitarian than a pouch style case and I have full access to my headphone jack and volume keys when it's holstered. It also leaves the entire back exposed. Depending on where your custom cover starts bulging, this might work for you since it only clips the bottom corners and the middle of the top. The aesthetics may leave something to be desired compared to a nice leather case, but it's a great case for my needs. The only dealbreaker is that it will only work with a naked Evo.