Try looking for some LED side markers that you could mount. I've also seen some pics where folks just move the existing side marker in further and attach to the fender.
If it's a JK, those lights in the fenders are just side markers. I installed a strip of amber LEDs under the hood so they shine through the gap between the hood and body.Love the tube fenders but my ride is also a daily. If I put the tubes on I lose my turn signals. Any ideas?