Multiple image for one description in Next Gen

Here is the site I am working on.
https://www.jkltd.com/newsite/antiques/

The client would like to have multiple images for one product they are showing. I ‘cheated’ by putting 2 images together, but I wasn’t sure if there was a way in Next Gen to have it show multiple images to click through once you click on the image.

I tried going the album route, but it’s not what I was looking for.

Or is there another plug in that would accomplish this? They aren’t selling it online, but showing what is available.

Thank you!