I really doubt that it comes with a new bearing as it is considered a separate piece and considered a spacer.
The link I have attached below is the rear wheel schematic, what you tossed out is part #11. It is called the distance collar. Don't get too p!ssed, I nearly did the same thing last week on my 400f. It is really easy to do. I know it is after the fact but when I do jobs like that I keep the old parts around for a little bit in the old packaging just in case. Saved me a couple times now, like in the case of my 400f. I only caught it because it obviously doesn't work without the piece.
Post a wanted ad in the classifieds section, somebody will probably have a rear wheel or something for you. If I had a spare rear wheel I would hook you up but no luck.