This is the exact one I ordered. Fit perfectly in that spot. I just had some scrap metal laying around and marked holes to match up to the existing core support.
I'll chime in here too about campers. We had an Opus OP-4 that towed fantastic (it's super light anyway). After my wife got tired of not having a bathroom/toilet, we got into an Intech Sol Horizon. This camper has been amazing. It's small, but roomy, and pretty light for what it is.
I did...