Bah, I cannot seem to find the Denso part number either.
On a different note, I contacted several Denso companies, but all refer me to my dealer and my dealer (of course) cannot help me with some more specifics on the alternator.
My last resort is Denso HQ in Europe. Hopefully someone there can help me out.
What use are part numbers, when you cannot find any information (or even cross-reference) it with other alternators?!
I have 2 part numbers:
Toyota: 27060-26030
Denso: 104210-4771
And some weird number at the bottom: DN 12V 31060
But nothings seems to help! Seems I am "screwed" with my current alternator.