I noticed that the model of Epitaph by grisscoat appeared to have missing faces on the back, which wouldn't do for my uses. It definitely still has broken faces according to cura, but it'll print as a solid anyways. It's super unomptimized for printing (in fact, I haven't even printed it yet, so I have no idea if it'll work) because this was my first time using Blender, but at least it won't be hollow.