See if your county business license office has an online search or if they have services where you can request a copy.
If you requested articles when the account was opened, you may find the business address in there (or at least the original office's location).
Other than that, I don't know what else to try.
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I can't herd the cats anymore, so I just set up the electric fences and let them fry when they stray out of bounds.