I feel you pain but I doubt if sourcing your (choice) briskets elsewhere would have a big impact on quality of butchering. Most are processed by 3 or 4 big packers like Excel (Cargill), IBP, ConAgra, and Beef Packers Inc. and my guess is the emphasis is on speed and not accuracy in these mega-processing plants. If you opt for the higher priced, specialty briskies, I suspect you'll get more uniform cuts, but then that's pure speculation on my part.
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