Bachmann Spare Parts?

I bought a Bachmann Prussia 4-2-0 Locomotive and
tender at a Greenberg Show and, likely due to my
own fault, the nylon gear stripped. Where can I
get a replacement assembly? I believe the part number for the complete part is 3815. The part number for the gear itself is 3815-4.
I did contact Bachmann but was told they are no longer supporting the model. Please send me an email to MichaelLSr@juno.com