Did It! (Replaced Safari single step with double)
My 2004 Safari 25 footer came with a single step. They, Airstream used a standard RV step on my Safari, not the Airstream designed step. They started installing double steps in 2005. I measured the distance between the ends of the bannana wrap and then went to Camping World, and found a double step which would fit. It is a tight fit. I had to redrill mounting holes in the front (outboard) mounting flange on the trailer to match the step, and redrill the step for the rear (inner) mounting to match the trailer. Sorry I don't know which step I purchased, as I gave the single step away with the box.
The cost was not anything close to the $650 price posted earlier.
ESCAPEES SKP 58345
04 Safari 25SS, 03 Toyota Tundra