I was thinking of one but i looked at the bottom of one there is no grip on the feet and to me they don't look safe enough.
The ones pictured in this post, are very secure, and have not slipped in the time ive had them, they have a unique design which you cant see clearly but the feet have nobbles on the bottom and are slightly angled which ensures you have the correct angle to work safely.
These ladders are very small when not extended and will fit in the boot of a small car so a van like the kangoo would be no problem.
Hope this clears things up.