Like here:
http://bullpupunlimited.com
I went back to stock 870 Police config, reminded me too much of my jack-booted thug days to hide it in a plastic stock - no matter how functional. Plus I have a KSG now so the bull pup shotgun urge is satisfied. I probably only put 20 rounds through this thing, after working with the manufacturer on some issues with the first one I had. This one works flawlessly, but I'd describe the trigger as "mushy" - as it is on all of them.
They can be had for $299 new, best price I've seen. If $200 shipped (CONUS only) isn't fair, let me know and you might save me the trouble of doing Armslist or Gunbroker.
I can take pics if you like, but it really is just like the one in the link above.