You became educated on what working temperament is, and you became knowledgeable about your chosen sport so that you could recognize a good dog when you saw one. Now you've looked for over a year, and you're about to give up. The dog you want isn't out there. Not even close, actually. Begin by expanding your search.
Many sports have limited regional or national popularity.
If you breed Malinois for conformation, and you want to incorporate French Ring working drives, it is likely that you will have to go to Europe to find a large enough selection of dogs to find one that meets your requirements in both areas. This is where the Internet and personal connections will really pay off. Having friends that are knowledgeable about your sport in foreign countries can allow you some access to the dog in question without actually seeing the dog yourself. Ask someone you trust to evaluate the dog. You may need to have more than one person evaluate the dog, if multiple dimensions are being considered.