I have a solution for you but we don't have a replacement lens in those dimensions. For an exact replacement part you would need to check with your trailer's manufacturer.
You spoke of wanting to replace the porch light and read reviews, the closest light we have to the 2-1/4" x 4-13/16" dimensions is going to be the Low Profile LED Utility Light item # 328-007-61W. This is a 5-5/8" x 3-1/8" warm white LED light. It will provide 204 lumens of light and is far more efficient than your... view full answer...
The tire that comes with Karrier ST205/75R15 Radial Trailer Tire with 15" Aluminum Wheel - 5 on 4-1/2 - Load Range C # AM32404 has a speed rating of M or 81 MPH. view full answer...