Malcolm,
The Ives Train Society is a great group of collectors and currently has about 250 members. For those attending York, there is a meeting in the Orange hall conference room at noon on Friday. There is always a fascinating display of Ives trains and related discussions. The club website is a handy reference as are the yearly publications.
Regarding parting out the #1122 for parts. No fortune to be realized, but the parts are always desirable and can help someone complete their engine. Ironically, I just purchased a small group of parts for that one missing part I needed for my #1122, the brass ferrule for the smokestack.
Eric
TCA, LCCA, Ives Train Society