I would take this photo (and a photo of your dining room) and visit the highest level carpet show room you can think of. Their in-store design staff (aka sales staff) will help you create a project that will work for you space regardless of the exact match to the carpet runner you found in a photo.

Using the image as inspiration + the knowledge/product availability of a well trained carpet flooring sales person (who understands his/her stock/sources extremely well) will get you what you want and what your space needs.