The iPhone's latest holsters are from luxury leather case maker Vaja, which has developed two new designs - the iVolution Holster for iPhone ($55 and up) and the iVolution Lady Holster for iPhone ($80 and up). Each covers part of iPhone's back, sides, and bottom with internally reinforced padded leather; the Lady Holster version covers less of iPhone's back, but has a top clip to further stabilize the phone inside. As with the Holster, you can choose…