We here at iT Guy Technologies don’t carry the iPad ourselves.
The best way to get one if need one ASAP is to order it online (or call Apple Sales Hotline: 1-888-314-2525). I ordered one myself the day it was announce and it should arrive in a day or so (we had it engraved).

The iPad 3 (TriPad) are:
16 GB $519
32 GB $619
64 GB $719

16 GB w/4G $649
32 GB w/4G $749
64 GB w/4G $849

iPad 2
16GB $419
16GB w/3G $549

There are also refurbished iPads available from Apple.
Apple Sales Hotline: 1-888-314-2525
tell ‘em iT Guy Technologies sent you