I noticed this ad on Kijiji and thought someone might like it. They say it would fit a Boler or Trillium....it's a Westfalia Add-a-Room tent in St. Thomas, Ontario.
I searched Kijiji Ontario again and it appears to be gone.
I happened to see it when I googled "kijiji ontario triliium" They said it was actually a tent room for a Westfalia van but it would fit the awning rail of a Boler or Trilliam too.