The closest we can come to this size is the Replacement Red Lens for Peterson Oval Clearance or Side Marker Light w/ Reflector, part # 108-15R. This replacement lens measures 3-3/4" wide X 1-5/8" tall. I cannot guarantee this replacement lens will fit your rear running light that measures 3-3/4" wide X 1-3/4" tall. You can always replace the entire light with the
Optronics Trailer Clearance or Side Marker Light w/ Reflector - Incandescent - Oval - Red Lens, part # MC38RB.
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