So I gave my son my R1100GS, since I'm not using it anymore, and he's in need of a road bike. However, the front master cylinder is leaking and the goo has also ruined the brake light switch. I've looked thru several pages here - anyone suggest a good place to get a used, working replacement or a new one for less than the silly prices the dealer wants? It's a 1998 so it's rather an antique by BMW standards. I see Beemer Boneyard has rebuild kits. Any other good thoughts?