This topic was covered a couple of weeks ago, but here's the basics; going to the Local FBO or local charter operator and buying is the quickest way, the only web sight that I know of for (US) charts is
www.fltplan.com (although I have seen others discussed, lastly, as stated earlier, updates and revisions are constantly required by a charter operator, go ask your local operator if they have EXPIRED charts. There not good for the real thing, but great for simulating(these should include approach plates as well).

.....so I loaded up the plane and moved to Middle-EEEE..........OIL..that is......