I don't believe that Critical make a PM7 trigger either - if they do, it isn't listed on their site.
The only one of the big names that makes a PM7 specific trigger is CP, with Rake and Slingblade triggers being available.
Slingblade style shown here.
are a less known company (based in Germany) who none the less offer a wide range of triggers, including for the PM7.
You then have the custom makers like acid-custum and thebetterone, both members here, who may be able to make a trigger for you.