Looks like the PSU is in stock now. Looks like the case is out of stock.
Why not OEM for the OS? It's no different than Retail, less a fancy box and telephone support (free for a year I think?). Also same for Office. Looks like the OEM version is much cheaper. And unless they need the 2007 version, you can probably get 2003 for a little cheaper.
http://www.newegg.com/Product/Produc...82E16837102084