I put one on a Triton VT17. It works well.
It was bought to settle down Mrs Stymie's fears of me drowning from a winter fall-in from not being able to get back in the boat. Luckily, never been used for that purpose, but we do use it a lot when I take the boys swimming in the summer.
I got mine at bass pro. Bass Pro Shops - Folding Ladder - Universal Mount customer reviews - product reviews - read top consumer ratings