Some weeks ago i found an interesting webpage. At funkservice.at Gerhard offers PLL modules and DDS modules that fit to the LC7132 pinout of old CB radios. With these modules you can change your old 40 channel CB radio into an 80 channel version. I did this with my old dnt Carat exclusiv which was one of my very first radios that i ever owned. Now it has full 80 channels.
Unfortunately with this modification it lost its operating permission :)
But i am writing these lines because Gerhard also offers modules to modify old CB radios for FM usage within the 10m amateur band FM range. The modules will do automatic repeater shift within the 10m repeater frequencies.
This might be a good way to get some activity to this band using old CB rigs for doing some local qso on 10m in FM.
It is also a chance to support newcomers with transceivers that cost just a few Euro.

dnt Carat converted to 80ch