Reebok Gear
Head to the in-game cheat menu (the "RBK password"), and type in h3oyxpwksf8ibcgt. If inserted correctly, you will receive a bunch of new Reebok-related jerseys.
CCM Gear
To get old-style CCM uniforms, type fh6ft48h9kkhb in as your password in-game. (unverified)