The chances of finding an exact match are slim based on age. Here’s a triple LED upgrade, just use a test light or multimeter to determine what wire does what on the RV then match them to the new lights. You may need to fabricate a backing if there’s a significant size difference. Make sure you use bytle tape under the lights, I typically don’t seal the bottom so if water does get inside it can drain out.
Here’s a backing material you could use: 5 Pack 12 x 12 x.125 Black HDPE Sheets, Great for DIY Projects for Home and Marine Applications, Black Plastic Sheets, High Density Polyethylene Sheets, Made in USA https://www.amazon.com/dp/B082VKG6VV..._YSh1EbVARX0Y9
White Butyl Tape 1/8 inch x 1 inch x 30 feet for RV/Mobile Home (Single Roll) https://www.amazon.com/dp/B07BJLHH24..._uUh1EbYM4R39N