The magic pants are by a designer called "noir" whose clothes I have not seen elsewhere -- I got them from the Runway at Winner's, Vancouver. They are European sized...I think I discovered they were a Danish company. Superb pants, very fashion forward at the time, slouchy, baggy, and exceptionally fluid. So glad I splurged on those.
Dianthus, I sent the Lanai back due to fit issues. And it is navy with stripes -- not that it would be a problem to wear it with black pants, but it wouldn't be the full tux look.
Ariadne, I hope I will have photos to come!