John, you might try Ulrich Models, I know he does some decoders in stalls. Here is a link.
http://www.ulrichmodels.biz/servlet/StoreFront
Great customer support!
Cuda Ken
I hate Rust
I looking at purchasing 1 or 2 Proto SD45's. They are DCC ready, but has any one put sound in one? It looks like a small oval speaker might fit over the rear truck. Any help with this would be great.
Thanks
John