I know of the SE-14R Stormtrooper blaster (Swiss Rexim-Favor sub-machine gun conversion), it is nice, but the E-11 is the most iconic one, being also used in the movies, and not just on promo shots. I know of Kropserkel too, I used to own one of their Scout helmets, really nice. Good luck with the build
As for Tamer, I think you should go for one the following 3 options regarding an E-11: Master Replicas, Hyperfirm or Doopys.