We no longer carry veneer sheets, as they are readily available on Amazon in various sizes at reasonable prices. I recommend using the peel and stick 3M veneers they offer, since you can cut and trim them after applying them to the face frames.
As for painting or staining them to match, that part can be a bit more challenging. We cannot pre finish and ship veneers because the finish layer tends to crack or scratch during installation and trimming of the edges. For best results, the veneer should be finished after it is installed. This may require some trial and error to achieve a proper match, but with a little time and effort, you should be able to get a good result.