In addition to HWC's comment, you can also find FakeIDs around college towns. If you know someone who is going to college locally (even Community) ask them if they know someone. You can also, from time to time, find postings in craigslist. Usually they say for 'entertainment value' or 'educational use' and typically don't last long. Also, a ton of risk in involved.
Years and years ago I got my Fake ID at University of Florida, turns out a professor (who has loooong since been fired) was creating them using the schools ID system. Since they had the transparent hologram overlays, they looked like legit florida IDs. This was back when we were on the old-style laminated IDs, now they use a completely different system but I imagine you'd be able to find someone whose good at it.
So at any rate, look around college if you can. Lot less risk than buying online.