I just acquired a neglected 6220 locomotive and got her moving again! Unfortunately, the pawl wheel was never lubricated and the teeth are worn away. My favorite sources for Lionel parts were unable to find the 622-49 part. It seems that in the late 80's Lionel reused the same bell ringing mechanism in their 8503. It seems it may be possible to use the 8503-49 instead, but substituting plastic for metal may not be what I'd like to do, and I'm not sure on fitment.
Anyone have any leads/sources and substitution information?