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. Though unisex in name, the standard iVolution Holster provides three belt clip options - none, a plastic belt clip with non-removable metal nub (Ultra,…