I agree with "Call The Obvious" store on the web. Good quality and UPS in two days.
Another one I've used is "Purchase Officials Supplies"; 1-800-767-2233.
Also good is ordering from National Federation HS catalog (if you're planning on during high school level games). 1-800-776-3462. Ask for a catalog, or go to
http://www.nfhs.org website.
Hope this helps...