APX 7000 "Invalid Codeplug"

I recently acquired a VHF/700 Model III APX 7000. When I tried to read it with the CPS, it gave me an "Invalid Codeplug" error. It'll read the model and flashcode configuration. I don't know if this has anything to do with it, but the flashcode is set to all zeros. Unfortunately, I don't have any codeplugs to load in to the radio. Is there a workaround for this, or is this a lost cause?