Robin Garr wrote: Rainbow Blossom?
That's where I'd start. They carry the Bob's Red Mill line of products. When I was looking for 00 flour, I found Rainbow Blossom had dozens of Red Mill varieties. Didn't notice if they carried the chickpea/garbanzo specifically, but Red Mill produces it:
1260c164_garbanzobeanflour_f_1800.jpg
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