They are not usually suitable for eating with, or even getting too drunk with. Also, the cheaper home made types suffer from the colour being inappropriate and so professionally made ones are always better. You might try your local dental technician (dental repairs - Yellow Pages) since they are often quite keen to do work which is both theatrical and original, plus they will make an effort to make them comfortable and colour matched. An alternative is to get fully cemented caps, but consider whether you can carry that off as a permanent modification.