They stopped production on the CZ-91 in the early 90s.
Their rarity makes them more expensive then the BRS, TP9, and other restricted options for Canada. The TEC 9 and MAC families are banned by name, and KRISS won't be allowed out of the USA, so we don't really have a lot of options.
Although I like the modern look of the TP9 (perhaps a bit TOO much plastic), the BRS-99 has that $1695 price tag making it one of the cheaper options. Sadly all of these machine pistols are stuck at 5 rounds rather then 10. This is kind of silly because in civilian form they are simply very expensive handguns.