You can find the information you need in a couple of different ways depending on how you are using Houzz. You can click on the green 'more info' link if you are on a computer, or tap on the photo if you are using the Houzz app.
Either way you should see a link to a store or vendor. Click on the link for further information.

Hello,
We're checking in to see if there is any more stock available and will get back to you as soon as possible. Many of our fabrics are discontinued/end of bolt (this is how we pass savings on to our customers), but unfortunately this also makes it difficult to re-order. If we are unable to reorder, we're happy to discuss your design project and send free samples of any fabrics that may fit your needs/that are similar to this. You can call us at 866-475-6907 or email us at info@fabricseen.com anytime! We apologize for the inconvenience.

Good Afternoon! We do have 3 additional yards, but this is the last of the stock. The site has been updated to reflect it. I hope this is enough yardage for your project: http://fabricseen.com/product/delicia-stripe-upholstery-in-taupe-black/
Please let me know if you have any questions!

Do you have any other fabric with stripes and colors like this one? I need 20 yards

Here are a few that may work for you. We also have a batch of new fabrics coming in so I'll keep an eye out as we add them to the site. If any of these interest you, you can order a free swatch by clicking the links:
http://fabricseen.com/product/clean-stripe-outdoor-upholstery-fabric-granite/
http://fabricseen.com/product/monterey-stripe-upholstery-in-silver-black-brown-silver-stripe-upholstery-fabric/
http://fabricseen.com/product/on-track-black-white-striped-upholstery-fabric-in-black/
http://fabricseen.com/product/versailles-stripes-velvet-upholstery-fabric-in-black/