What I wound up doing was a little fabrication - using a piece of shelving bracket, I attached it to the passenger side of the shift boot plastic housing, using existing screw holes (which fastened to structural metal). I then attached the u-shaped mounting bracket with the CB (I scored a Midland CB in good condition from Goodwill for $4.99, but still need an antenna) and I was all set. I really should take some pictures. This would seem like it would be doable with many different years, depending on the fastening screw positions for the year in question.
Thanks for the input.