The Hanlin V3 and V5 (sold under many names worldwide, e.g. EZ Reader in the US) have turn buttons on the bottom and left side.
The PocketBook 302, has "host" USB (and bluetooth). This means that they can in principle use a mouse and/or trackball. I don't remember seeing any confirmation that they work though. A few other readers now come with bluetooth, but again are not necessarily setup for bluetooth input devices.
See
E-book Reader Matrix for devices with bluetooth.