Welcome to the boards Nightguard!
I have found that one of the best sources for icons is
Here
Most of the time the people who have created them don't mind if you use them. If they are too big for the forum, you can always use a paintbrush or photoshop type program to shrink them. If you need any help, let me know!
Welcome to all the other newbies I may have missed!
:partyman: