Hidden Sockets For Coat Hooks

[Sensha]

I have a Scion iQ (2012 vintage), and am looking for a solution to a storage problem for the rear area, specifically a couple of places to hang clothing.

In some of the past Toyota products that I have bought, there is a ready made threaded socket located beneath the headliner, and all that you had to do was to purchase the knob and the screw from Toyota, then screw them into place. Specifically, this was the case with the 1982 Starlet and the 2003 Tercel

With the newer cars, the hinge down entry assist handles have taken the place of the traditional coat hook/knob. However, the iQ has no rear handles.

Does anybody know if there are mounting points for these hangers beneath the iQ headliner?