Adding dynamic brakes to undecorated Kato SD40-2?

I was wondering if there are detail parts out there to add dynamic brake details to an undecorated Kato SD40-2. I would like to paint some of these in BN colors. Anyone out there ever tried this? Also, can someone tell me what a “gull wing” cab is on Kato’s undecorated C44-9W’s?

Just to clarify, this is N scale.