96 Fourtrax 200 froze brake cam

Newbie here. I bought a 96 200 fourtrax for the kids that have no brakes. When I pulled the rear drum there was nothing in there and I realized the brake cam was frozen. I have never fooled with brakes on atvs but what I did realize is they no longer make that brake cam so I need some advice on how to get it out without damaging it. Thanks in advance.