Also, try e-bay.  I know I saw a Samhongsa one go not too long ago, and, perhaps, you could find one that would make yours look like a GS-3, with a single headlamp.

Not a problem. I'd recommend cutting off the square coal top all together.  A fellow club member showed me an interesting trick.  He replaced most of the coal load in his tender with a black open sponge-like material, I think it was part of a fish filter or something, and then put just a little coal on top.  This served as an escape rout for a top-firing speaker.  The black sponge material looked good, and allowed the sound through very well, and the sprinkling of coal on top completed the look.

After a recent question to Athearn, I was recently informed that they will soon (no exact date) be releasing the Vanderbilt tenders that are currently running with their Genesis SP Mountains.  Perhaps, when they are released, they could be modified and work with your B&O 5501?

in addition the locomotive i'm looking for is item no. 51511.  I can get most of the body unmounted, but I cannot seem to get the front of the boiler off the chasis.

It appears that the instructions for my Bachman 2-6-2 Prarie have either disapeared, or were omitted from the package.  I am attempting to put a Digitrax decoder (N Scale sized due to how small the locomotive is) into the locomotive.  This became a problem, due to the fact that I couldn't take the engine appart.  Anyone have a scan of the instructions?