It seems to me that pjmag posted a link to an FCC page where Purcell was applying for a license for some 800 frequencies. It was so long ago, that I don't remember the whole story except to say that I put a "placeholder" site in my OK DPS system for Purcell.
Let us know if you hear anything else. The DPS system will come closer to solving the interoperability issues that they were complaining about - better than that TRBO garbage that they bought. Are you able to monitor P25?