From reviewing the tunes mentioned thus far that have a "B" part which uses more of the high notes of the D whistle, it appears that probably every other tune in any session will have something like this.

There is another option which is costly, but effective. The traditionalists will shout, but maybe buying a Copeland or Burke which do have the "punch" and are considered "louder" may be helpful.

But truly, one person made it clear that the purpose of a session is for all musicians to play along with each other and not try to outdo or out volume the rest.

And in the "For What It's Worth" department, try The Rights of Man. That one will get you heard.

Good luck and happy whistling.