I need 24 squares of "Original" Timberline 30 year shingles, Heather Blend. They were discontinued in 1999 by GAF. Southern Roofing put them on my parents-in-law's house in 2000. We are adding on to the house, which has a 16 in 12 roof slope and required 60 squares when it was re-roofed 2 years ago, so re-roofing the whole house is not an option. Any help would be greatly appreciated.