Yes, sadly there aren't any lever options, or any that have been identified. Seems there are differences from the Roadster and Triumph uses a non-standard setup for the Touring lever mounting points. Several fellow Rocketeers have tried and tried, but still non-available.
Asv levers are the best hands down. But to me look more suited on a sports bike very aggressive looking , asv levers with triumph logo on would be a match made in heaven.