I would just adapt what you have as a platform for any camp stove you like.
In the photo below I adapted the BBQ rack to create a shelf for a Coleman Gladiator stove. You could easily do the same thing by removing the hanging hardware from what you have now and mounting it on a simple shelf.
Note that if you want to use a camp stove you need to either run a hose back to the propane tank, or remove the regulator from the stove to run off the low pressure quick connect fitting on the trailer. Lots of threads here on how to do that.
Love this Coleman stove. It has high output burners that cook so much faster than the old Suburban burners. We actually need to use a diffuser on it for cooking anything sensitive (like eggs).