You are correct about Thule as I am looking at the boxes as I speak at the Subaru dealership while Im getting my arch moldings installed. My cargo box has nothing to do with Subaru or Thule and purchased over 2 years ago and had it on my Navigator.
I bought my "Vogager XL" model 2 years ago from REI--its 18sf. Vogager XL was sold by Pepboys. REI's drop ship warehouse accidently shipped me the Pepboys model (I may have said Sears earlier but they have/had the exact same box at one point) because that warehouse ships out a few of the OEM Yakima cargo boxes with the only difference being sticker. I should have had a "SportRack" sticker on the box.
This is exactly what I have below. Think the final cost was about $220, after a refund giving by REI for this mistake in shipping the wrong "sticker". I think Pepboys was selling them for right around $200 or so.
Voyager XL Aero XL SportRack Cargo Roof Box - YouTube