[MassHistPres] Source for roof shingles

[sally milne]

Hello everyone,
     Harwich mass, recently experienced a tornado with damages. Our historic Elmer Crowell barn lost a few  roofing shingles.
The specific shingle is  the  GAF "Sienna" (style, not color) roofing shingles . Apparently the line itself has been discontinued. There only a few needed as the roof shingles were only installed a few yers go.  Any ideas would be appreciated 
Thank you
Sally Urbano
Harwich Mass.
Individual
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