NCE decoder for GS4?

[4merroad4man]

Does anyone know of an NCE decodere that is an exact fit for the Bachmann SP GS4 4-8-4?
The factory instaled decoder humms something terrible, and I was going to change it out anyway to bring it in compliance with the rest of my locomotives.

[Tylerf]

I added a decoder to an older non DCC version and found almost no space in the locomotive so the tender was the only option. Now I don't know what the new ones do whether or not the decoder is in the tender or not but my tender was completly empty so there was tons of room for any decoder.
Good luck
Tyler