According to my research it looks like your 2013 Prime Time LaCrosse has a front porch light similar to the LED Porch and Utility Light for RVs # RVPLL13AB so if it matches the dimensions (see attached) then the Replacement Clear Oval Acrylic Lens # OPT47FR will work.
If you're wanting an upgrade then I recommend checking out the ATAK Solar Motion Light # PT701 which doesn't require any wiring ad provides light to you when you need it due to the motion sensor. This looks a little more... view full answer...