There is a 1980ish Colnago Sport on Italian ebay at the moment. The seller says it was a low end model, Made in Italy, that was made by Velosport. It does have a decal on the downtube that says "Product Velosport". Item 290211300512. Lousy photos.
Throwing this out to the list as I didn't find any references to Colnago by Velosport in the archives, although there was a reference to Colner's by Velosport.