Hey,
Kevin Smith with Rock-Slide Engineering was behind us on a run (Fins-n-Things) at last year's Labor Day Safari.
He even got some pictures of us using a kitchen step stool that we need for my wife. We talked a little bit about our interest in something simple. I wrote him a few times but never heard back from him. I'm interested in something very simple (no electric power, or at least no automatic operation). He could tell I wasn't interested in spending a lot of money.
I believe Kevin is in engineering. You might try to contact him if you're interested. Mention the couple in the red Bronco with the white step stool and he'll probably chuckle a little.
I really do need something... Good luck with your search.
Thanks,
Jeff