Check out this link to The Safety Step Company. www.safetystep.net
. They offer a full line of step stools for the RV users. All of their items are "anti-tip". Most local RV stores carry their line. The Safety Step web site lists some of the RV dealors that carry these. My personal favorite is the one in granite color - really classy looking. A note - be careful of the plastic steps. They slip out from under you easy and can fracture in cold weather. I would also only pick a step with a platform size of 15 X 19 or larger.