I've never heard of searching for fabric that way.
When I search for fabric, I just use Google (I've tried other search engines but honestly get the best results from Google). I put in the name of the fabric line, and/or designer, and/or manufacturer, and sku if I have it. Oftentimes you can find the sku on the manufacturer's website. The more info I plug into the search engine, the better my search results.
Once the search results pop up, I click on the "shopping" tab at the top of the page and it will show a thumbnail picture of the fabric along with the price and website. You can also filter the search results using options found on the left side of the page.