I am trying to find a white decorative rock material with a high SRI for a roof application and am having a very difficult time finding any suppliers that have determined an SRI for this type of product. I've search the LBL and cool roofs site with no luck. Does anyone know where I can find suppliers of this type of material who can provide an SRI. The LEED reference guide in the table on page 122 indicates there is a "white coated gravel on built up roof" material - and the table references the LBL Cool Roofing Materials Database - but I can find no such material in the database. Any help is much appreciated.