Right now, if I disable the store for anonymous users, it hides the Add to Cart and the entire form with it, including the Select List of options.

I use Ubercart Ajax Calculations to show price and SKU updates when people select options from the dropdown, so I need the anonymous users to be able to use the Select List, but not the Add to Cart button.

I tried doing this with CSS but somehow, every now and then, anonymous people are able to add to cart and checkout still, probably because they're using an odd or old browser that still shows the button, regardless of the CSS that hides it.