You can use this one if you like. It took me 5 minutes to build and ship it. No charge.
Some browsers find favicons on their own if you just put the favicon.ico file in the domain's root directory or the same directory as your web page. To help other browsers, I've been in the habit of including these lines in the <head> section of my html (and you would have http://asterisk.apod.com/viewforum.php and http://asterisk.apod.com/viewtopic.php generate them with the rest of the web page):
<link rel="icon" href="favicon.ico" type="image/x-icon">
<link rel="shortcut icon" href="favicon.ico" type="image/x-icon">