Is there a database or central download location for all

[RazGator]

I'm throwing them up as fast as I can! I have a bunch of the old Squad Leader scenarios in PDF format that allows you to put a scenario together pretty quick. I can shoot them to you if you would like.

[Double_Deuce]

The Wargamer link Cross posted is probably your best bet. There may be a scenario or two hosted on other sites but that number would likely be very few.