I have an earlier version of one of these cases.
https://www.amazon.com/iGadgitz-Leat..._89%3Aigadgitz
My case is fairly rugged. The Voyage is held pretty tightly. I know this sounds somewhat weird but, get the case and cut off the front flap. This is assuming the case is still tough. Tried to look close at the photos but can't determine if it will work for your use. I think my case with a cut off at the hinge would work as you want it to.