The Standard, Classic and Roadster all have the same screen shape.
The Touring is different.
So the 'T5166C LIP for Rocket III-Roadster, Clear' should fit your 2006
Also this was probably designed before the Roadster was born. Back in the days of real Rockets the big touring screen for the standards and classics was actually called a Roadster Screen by triumph. The smaller was the summer screen, the smallest was the sports screen, then the solid fly screen.
The Standard, Classic and Roadster all have the same screen shape.
The Touring is different.
So the 'T5166C LIP for Rocket III-Roadster, Clear' should fit your 2006
DON'T WASTE YOUR MONEY.
I had one on mine and it was a PITA to keep clean. It's NOT scratch protected, soon marks and you end up with a scratched screen just in your line of sight.
I just made some brackets to simply lift the screen higher.