Ok, so all of you can help this chap out, here's the current list of BRCA homologated 19t motors.
Integy Matrix V10
Trinity Chameleon 2
Fantom 19 x 1 Spec
Demon Demon Power
I've had a fiddle with the Matrix version. Trinity 4499 brushes with a harder positive spring give it noticably more power without increasing the wear.