Here are a few good groups on Yahoo that may interest you.
snipped-for-privacy@yahoogroups.com
Rivarossi_AHM_IHC_Bachmann_Steam snipped-for-privacy@yahoogroups.com
Bachmann_HO_Old_Steam snipped-for-privacy@yahoogroups.com
Bachmann snipped-for-privacy@yahoogroups.com
Jim