You might try J R Kosher Meat ...they will prepare everything in true Kosher not Kosher style. Here is their website BUT be prepared to pay and pay....http://www.jrkosher.com/
also you can try a Kosher Caterer here is one I use all the time called Adams Gourmet - he is also Kosher and very tasty.
Both are excellent just price them and go with the best price. Quality is excellent for both.