The short: How can I tell which flyback transformers would work for a 9" Macintosh?
The long: I've soldered on flyback transformers on old Macs that have gone bad in the past, but when my Mac Plus let out its magic smoke recently, I discovered that it's no longer cheap and easy to just get an old 157-0026-C flyback transformer from a dead Mac SE.
I can see that there are a lot of cheap flyback transformers available online, many of which specify things like "For nine inch black and white tube", are the right voltage and frequency, and have the right number of pins. But I have no idea what sort of things to even ask to find out if they are compatible.
Does anybody have experience with trying out non-standard flyback transformers? Failing that, any suggestions for where I can get an official one for cheap?