Amerilite parts specifically corner caps

OK thanks! I will take another look at the links that you gave us. This trim is located and attaches vertically at the bottom of each corner to trim the edge of the metal siding and is not under the unit. Without this trim piece the corners are left open and the sheet metal siding edge is exposed and ragged...so it really does look very bad without it, however, my greatest concern is that rain and wind can blow straight into the wall framing when underway, also it appears that insects and possibly even mice could enter there. This should have been made of aluminum to begin with...