there's a reason they went out of business. nobody wants one.
there's been a number of "bikes" built like that in the past 100 years or so, and every one of those companies failed.
if you want one for yourself, that's one thing, but if you're thinking of mass producng them, you might want to re-think that.
here's a super fancy one: http://www.biria.com/series/easy-boarding