FPD display image when selecting a product

WordPress, default theme, latest version of woo.

We have about 140 different hat colors/styles.  We have created a "hat" product and edited it with the product builder.  It currently has a black-and-white hat as the default.

How do we get it to "switch" to whatever hat the user has selected from the variant list in Woo?  We don't want to create 140 different FPD products, one for each style of hat.   Is there a dynamic way to swap the images in FPD based on the user's variant selection?

Thanks.