My Coachmen Orion has a nearly identical layout. I installed a Lagun table leg. To save money, I purchased the “factory second”. I had trouble with the company and might suggest one of the knock off versions available from Amazon.
In the Orion, the vertical “wall” wasn’t sturdy enough to hold the table leg, so I had to reinforce it with plywood. The screws that come from Lagun were too short, so I had to purchase different screws from a nearby hardware store. The design of Lagun is good, but their customer service is terrible and I specifically told them I would recommend a knock off version from Amazon if ever asked about Lagun.
Btw, a table top is not included so I found a decent desktop from a second hand store and used that. I didn’t want to alter the original table top which is likely too heavy anyway.
I don’t want to link directly to the Lagun company but if you search Lagun Table Leg on Amazon you’ll see many choices and they all appear to be identical to the original Lagun. I can’t vouch for the quality of the knock offs, but I can say the company who invented it are not easy to deal with. Also, Amazon provides for free returns if you have any problems. Lagun will make you pay return shipping cost plus restocking fees, if you’re able to actually get ahold of someone.
Hope this helps.