GAF Products makes Fiber-Cement Siding materials (sometimes refered to as Asbestos Cement Shingles.)
Once you find what you need from them, you can either start calling around in the YELLOW PAGE (under either ROOFING SUPPLIES or SIDING SUPPLIES), or ctc. GAF for Dealers. If this isn't it, as Dodgeman asked, can you be more specific.
My best to ya and hope this helps.
Jay J -Moderator
PS: I don't believe they come in a 'variety of colors'. You'll have to ask ...