Among the other disasters small and large in this kitchen remodel is the fact that the cabinet maker forgot the toe-kick step stool I really wanted. Now all the boxes for the base cabinets are made and in and it's too late to get one, without rebuilding a base. So, I'm trying to find an alternative stool that will fit in one of my limited other spaces, such as under one of the sinks. Problem is, I haven't been able to find one that is high enough (need at least 15" to reach top cabinets) and folds small enough. It can't be more than 20" in one direction and about 24" in another, folded depth could be up 8" or 10"...it's the 20" height available under the stile in the sink cabinets that's killing me.

Does anyone happen to know of a tallish stool that will fit?