Given the M-1's have asbestos, etc in them, they probbably classify as 'toxic waste' (well, the bathrooms sure are!)
Thus, they probbably are bound up by some stupid EPA regulation that prevents robbing parts off them...
This is typical three letter agency stupidity - I remember hearing about an old TV repair shop that closed, that the EPA (or state DEP?) 'raided' to clean up the 'toxic' warehouse of CRTs left over. Hundreds of otherwise perfectly useable tubes were smashed up and put into 55 gallon drums, and taken off to who knows where. Of course, sealled and intact, a CRT is nothing but a big glass jar. All the 'nasty' (and it really isn't anyway) stuff in it is inside the tube.
I've been needing a 21EP4 for a TV set for years now. It's a rare tube - rectangular, 70 degree deflection, from the early 50's. I need one, actually 2, and they're hard to find. I don't need some government idiot saving me from myself by smashing up what few are still out there