In this Flavor Moments we find the answer to Where’s the Beef? Cuts can be found On Montana Avenue at the new Buffalo Block at The Rex. The restaurant opened in 1909 by H. Alfred Heimer and his friend Buffalo Bill Cody is going through another chapter. Rick and Nicki Larson purchased the Rex last spring. After more than a year of remodeling, Buffalo Block at the Rex is due to open October 1.