For your Jeep Grand Cherokee, I recommend checking out the:
-Reese Pro Round Bar Weight Distribution w Sway Control # RE44FR.
This WDS has a maximum gross towing weight capacity of 11,500-lbs, and a maximum tongue weight capacity range of 650-1,150-lbs.
Additionally, this WDS system has a 7" tall frame bracket height. view full answer...
When it comes to putting a bike rack on your pop up camper with a pro rack system I recommend The Rhino-Rack Hybrid Roof Bike Rack - Wheel Mount - Clamp On - Aluminum # RRRBC050.
This carrier works with Aero Bars, Factory Bars, Round/Square Bars, and Elliptical Bars. It can hold up to 45 pounds. It fits bikes with 20 inch to 29 inch tires, and it comes with an integrated cable lock that adds an additional layer of theft deterrence.
I attached a review video link below. view full answer...
If you're meaning a lens, then you could use the Replacement Lens for RVSTL61 and RVST61 Tail light # AST61B which look identical to the OEM taillights, however to be sure you'd need to measure your current lens and compare it to # AST61B.
This lens measures 8 5/8" wide 3 3/16" tall, and 2 1/4" deep and will work directly with the RVSTL61 and RVST61 tail lights.
If you need something different feel free to include some measurements and a photo of what you're looking for and I'd be happy... view full answer...