I've never made it and can't vouch for accuracy, but Northern Brewer has a Spotted Cow clone recipe called Speckled Heifer. They post their ingredients as a PDF for all their kits. That's useful if you plan on using your LHBS instead of NB. I happen to have NB as my local shop and support them far beyond my wife's desires.
My father says, "hobbies are supposed to cost money".