I lost one (red one) somewhere in Tennessee last March. Found an RV dealership (not my model or brand, they didn't even have fifth wheels there), but their parts department had an exact match. Actually, they had an entire box of red and yellow, and I think they were only $3 or so. I picked up a couple extra red and a couple extra yellow (just in case).
Pop the other one off the opposite side of your camper and take it to your nearest RV dealership repair/parts shop and they'll have replacements. Where we picked ours up, they said they have a hard time keeping those in stock because so many people come in buying them, because they get lost so easy.
2019 Montana High Country 375FL Fifth Wheel
2014 Chevy Duramax HD 6.6 - 3500 Diesel Dully Long bed Crew Cab