Custom mouse overs for variation swatch plugin

Need larger image to display with mouse over on single product swatches. Right now alt text caption is displayed. Requirements are one-fits-all modification of plugin pref. where I can use on other sites. Woocommerce Color or Image Variation Swatches Convert variable select box into color or image select. Version 1.8.1 | By phppoet Swatches are to small and enlarging thumbs takes up to much space. Objective: Best display of material attributes where it's easy for customer pick variation.