bay area amusements has them available for $11.00

http://bayareaamusements.com/Merchant2/merchant.mvc?Store_Code=BAA&Screen=PROD&Product_Code=MX-31-1493

Creating this in a 3d file will take a bit more work than described.
A) the google image will be a jpeg most likely, if it's a clean enough image it can be used as a template to recreate the artwork (keep in mind that the "B" isn't connected to the rest of the letters and will need to be attached much like the logo linked above)
b) extruding the typeface won't look correct as this typeface should have curved edges
c) any mounting specifications for the back (brackets ect?)
D) final size needed?

If the above mentioned link doesn't work for what you want, those will be the items needed to be specified for this to be designed for you. Best of luck

Not sure what software you are thinking of using, but in maya that part is fairly trivial. Extrude the typeface and then use the edge loop tool.

For this though I do an outline of the text. Then do an outline of the backing piece, aka black area. Extrude them to size. Edge loop tool. Done.

Problem is this violates copyright and not worth it even if it were unavailable.

I know this is an old thread but search on here did't dig up any other close results...I'm looking for a Bally speaker logo in STL file format so I can 3D print one