Hi @martijnrunia,
This is a good question, and I am probably the worst person to answer this as I’ve never done it, but I’ll give it a go to maybe get the ball rolling.
Okay, so I was able to hack a solution by placing items that I wanted to have horizontal scroll into an element with display:flex, and overflow:auto.
As you may know, display:flex isn’t handled well in all browsers: Can I use... Support tables for HTML5, CSS3, etc
You can view my hack at the following video and Webflow share link:
- https://drive.google.com/file/d/0BynZs0dQwPd_M0wwdkdOcTVGOFU/view
- https://preview.webflow.com/preview/horizontal-scroll-test?preview=616d7a82082956a0e739d19899447d2e
I would love to hear of any other solutions from our community as you’ve peaked my interest 
Hopefully this helps 