Flashden has some great flash components that you can buy as low as $1, and use it where you like.
They have from preloader, scrollers, image galleries to full dynamic easy to use websites. All come in actionscript 2 and actionscript 3 flavours.
Check out my files on flashden:
Take a look at my other files on AudioJungle and Graphic River
–> Here are the flashden companion websites. You can find flash files, video templates, html/css templates, loops, music and professional graphics.