Well, as I recall, Norton offered a TLS brake with an air-cooling inlet very similar to that Grimeca on some of their Atlas, Dominator and early Commando models.
However, the later '60s Triumph TLS brakes were a different(and I believe an In-house) design all their own.
(...btw, upgrading to either a TLS or a 4LS Grimeca was a very popular thing to do back in the days of when Cafe Racers first became popular in the '60s...they were highly regarded back then, and had the same reputation that Brembo braking systems enjoy today)
