I do not have a SawStop but my solution to outfeed table needs might be an idea to consider. I built a utility bench 1/4 inch shorter than my table saw. It's normal position is behind the saw to serve as outfeed support. It has it's own wheels so it can also be moved.
My other observation is that there are different mobile bases that incorporate the legs for the extension table. If you like your saw pretty tall (like I do, mine is at 38 inches), you could probably put your own sub-base on and utilitize at least part of the mobile base that came with the saw.
Jim