An auction with eBay Canada turned up something interesting this week:
The seller confirms that it's a foldout catalog. Given that the cover image is a match for the 2002 dealer catalog, and my collection of foldout catalogs has a hole in 2002, I'd say that this is a 2002 foldout. This is the first one I've seen and until now I didn't think BRIO had even made one.
I seriously doubt there is anything earth shattering in this booklet, particularly since I've got pretty solid catalog coverage for the early 2000's, but if you live in Canada, would like this rare booklet, and you've always wanted a 2000-era Post Office set, too, then this would be your opportunity.