I don't think anyone uses them. The standard routine when they need
replacing (or for that matter you just want them out of the house) is
to use a silicon power diode with a series resistor to compensate
for the differences.

Getting replacement parts is not the issue here, people just don't
want to put selenium rectifiers back in a piece of equipment.

Michael


The first time you have one fail and smell it, it'll be abundantly clear
why people don't use them anymore.