Here's what I found useful...when checking out new products, go to reviews page...then, on the left hand side of the page, you will see a search filter list with many boxes you can check.
Check off the "no protein" box, then enter your product choice in the search box. If you enter something generic like just the brand name (e.g. "VO 5" ) then all of that brand name products *without* protein will come up. Hope that helps!