DansComp used to sell Sapim straight guage for a VERY good price, IIRC 35c each or so. Their website no longer carries spokes, sadly.
Niagara Cycle changed they're name/restructured. They are now The Bike Shop.com
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My bikes: '81 Trek 957, '83 Trek 720, '84 Trek 770, '85 Centurion Cinelli