another alternative...picked one up myself. Cheap and works well. Only negative-have to drill 2 holes to mount but easy installation.
http://cgi.ebay.com/ebaymotors/96-02-Ford-Mustang-GT-4-6L-K-N-Air-Charger-Filter-Kit_W0QQcmdZViewItemQQcategoryZ33659QQihZ019QQitemZ290019422452QQrdZ1