We (our local athletic association) bought a pre-built building, but we had to relocate one of the doors. We replaced the panel with a matching piece, but we're not sure how to finish it so that it matches the rest of the building. I guess the manufacturer is no longer reachable (which doesn't give me a great feeling), so we're left to guessing. Any ideas? Original is the yellower material on the left side and the thin strip on the top by the green metal roofing. The new panel is on the right (paler color).

[![enter image description here](https://i.stack.imgur.com/I3MFU.jpg)](https://i.stack.imgur.com/I3MFU.jpg)