If you don't mind laying out some cash, Southord makes a prepreped lock picking practice kit with locks that are already set up with 1 pin through 5 pin practice locks. You can find it at
http://www.lockpickshop.com in "Locksmith Training" under the heading "Lock Picking School in a Box" (and no, these aren't cut away locks. They're actual fully intact and repined locks).
That's assuming you want to take the easy way out and don't want to try the above mentioned techniques covering the repining of your own practice locks....
-ThubanPete