Hmmm...ok you should try 
1- sudo apt-get update
2- sudo apt-get install raspberrypi-kernel-headers
3- run the TrendTech command to install the drivers

If this still fails, maybe there's a repository to point to (I remember I uncommented the "sources" repo in the /etc/apt/sources.list file - using midnight commander and its integrated editor that I had previously installed with sudo apt-get install mc and run with sudo mc.  Great little clone of Norton Commander from the good old days of Microsoft DOS ^^ )

BTW after all your updates are you still in 5.10.17 or have you moved up to 5.10.52?

 

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