Alignment issues with non-variable products

Hi

I have aligned all of my add to cart buttons so they look nice and tidy on all screen sizes and it works well for any products like this
http://dev2.electrixinternational.com/product/15-degree-sloping-roof-push-button-enclosure-22-5-mm-holes/?attribute_pa_material-finish=polished&attribute_pa_holes-and-size-h1-h2-w-d-mm=3-holes-225-x-255-x-115-x-85

However, for non-variable products such as this
http://dev2.electrixinternational.com/product/allen-bradley-auxiliary-contact/

The aligment doesnt look great.

Do you have any suggestions on how to get the buttons either right ot left justified so they look neat without effecting the other variable products?