Use outdated ones to prepare and buy a recent one as soon as you arrive? Every flight school and rental shop has a small pilot shop which at the very least will have the most up to date charts and the AF/D.
US charts are updated more frequently than Euro charts (once every six months, I believe) and the AF/D is published every 56 days. (The AF/D contains the amendments to the charts, among other things.) So make sure you get up to date stuff.