Raw food diets, such as the one Michelle T. Bernard suggests in her book, Raising Cats Naturally, were carefully researched and refined, and each supplement used in the "recipe" is there for a specific purpose.
While you might be able to design a similar raw diet for cats, using mice instead of chicken or rabbit, it really would not be worth the effort involved, and would probably be more costly in the long run. Remember that these raw diets came about after years of research, and are carefully designed to include exact amounts of each ingredient for optimum nutritional value for cats.
If you are serious about a better diet for your cat, I'd suggest reading the book. If you do not want to mess with buying and measuring out all the supplements, you can buy them ready-mixed with Instincts from Feline Future, the originator of the raw diet for cats. Alternately, you could mix a week's supply of all the dry ingredients at one time, then measure out the amount needed each day. Either way, you would be assured that you are giving your cat the best diet possible.