I have found 3 of these so far. All for the 6 wire plug. For a 78 hilux, but probably fits other years too. One is an original, the other two were from autozone. I have a lifetime warranty on the alternator, so when it gets cooked next to the header every 6-12 months i buy a new matching regulator for like $25. The Haynes manual tells me some tests with a multimeter to see if it still works properly.

$10 each plus shipping. By all 3 for $25, and Ill throw in a TEQ oil filler cap.