hyperlink make a really nice one i have had good luck with all there
antennas. though the amps they sell can be consided on the cheap side.
here's a link for you. it is omni and not th cheapest considering it's
70 bucks and 8.5dbi more likely 7 after cable loss. if you were looking
for a cheap way to do it you could just buy the base for $19.99 and put
a 5.5dbi rubber duck on it.
http://www.hyperlinktech.com/web/re09u.php
this would work for ya to and a hell of a lot cheaper!!!
http://www.hyperlinktech.com/web/re05u.php