If you keep the original Triumph dresser bars, and you know someone good at TIG welding, then you can modify them like this...
They worked fine until I wrecked my bike, then they were destroyed, but so was the bike.
The Triumph bars stick out much further than the Rivco's as seen in this photo
...versus the Rivco, as seen here
The Rivco's are sturdier mostly because of the mounting system...in addition to the upper mounting bolt, the right and left pieces are connected to one another addition additional strength. My bike has fallen over three times so far and the only damage was I needed to replace the crush washers for the mirrors because the mirrors got spun around.
Keep in mind that the Rivco bars use smaller in diameter tubing, so you'll either need new pegs or have bushings made.