I looked around online and didn't find any replacement strum bars that i liked, so i designed this one based on my Wii Les Paul controller. i designed the profile of this to be a little thinner than the stock one but also a bit thicker than the later gh:live controller strumbars.This design has a subtle ridge at the tip for grip, which is it's much less prominent than the later gh:wt style strum bars but still provides plenty of grip. I've printed mine out of silk PLA with good results so far.
Additionally I've included a design for the softer bumper inserts that go into the strum bar, these i would recommend printing out of a softer TPU material.
Designed this model with onshape, so if you want to remix it you can find the original project files by searching for guitarhero wii strum bar” in the public documents.
edit:
Fixed an issue with by removing a support brace i added before fully testing.
The author hasn't provided the model origin yet.