I've even put the green CRT from a Monitor //c in a compact Mac, with the same result of picture, though green, of course.
If you come across a 9" B&W monitor/TV of any sort, there's a good chance the CRT is the same type. As mentioned, you want to keep the yoke with the tube, though making the adjustments on a B&W isn't nearly as time consuming as a color setup. There's the slight chance that the connector will not be the same, but of all the times I've sourced CRTs to fix Macs, from non-Apple equipment/sources, I think I had to change the connector a couple times out of probably hundreds over the years.