Customize Photo Gallery – thumbnail image different to main image

Hi,
I need to have a photo gallery to show the different colors you can apply to my clients product. For that matter i need the thumbnail image and the image to show to be different to each other ( plain color thumbnail that open an image of the colored product). Here is an example of what i am trying to do: http://www.disegnacolor.es/es/coleccionesDecking/nature

I dont see any built in solution in Enfold Theme, and tryed out a couple of plugings but they did not work propertly.

I can think about 2 possible solutions:

1. An existing plugin: Is there any photo gallery with this features compatible with Enfold?

2. Customize PHP: I thought on a fast fix by customizing Enfold photogallery by adding a new version of the existing gallery and concatenating a suffix like “tumb” to it on PHP. Like that i would only have to worry on name the files properly. If that works i would like to add the new gallery to backend shortcode options.

I am open to any other idea.
Thanks in advance,
C