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Griffin'sLight Impressions has the exact same binders- Roop even used the same image from them on their web site.
I've dealt with them for portfolios and archival supplies for about 20 years, they've always been very good to deal with.
http://www.lightimpressionsdirect.com/servlet/OnlineShopping?Dsp=20000&PCR=30000:100000:101000:101280
