CPU-RVL-40 isn't the last revision to still use Sharp parts, I just saw a RVL-60 on ebay that had a Sharp 1.8V regulator on the board.
I also found a RVL-40 that used a 1.8V regulator by RichTek, so it looks like they were simply used interchangeably for these revisions.
Not sure if any 101s...