Hey Chris. The brakes on my 555 were in really bad shape (the one shoe had no lining left on it at all) Drums were scored really bad. Tried to get OEM parts through AGCO. Had no luck with that but found a brake repair shop in a city nearby (AGCO partsman recommended) that was able to install new linings on all the shoes and true up the drums. Havent had a chance yet to install them yet but they look good. Don't know if this applies to your 101 problem or not.
John