I have ordered and received this kit:
https://www.amazon.com/Aisin-TKT-025...g+belt+kit+3.4
It was much cheaper than a Gates or Aisin kit/package from RockAuto.
I can confirm that the pump has Aisin cast in, but Toyota ground. It also has a sticker where TOYOTA would be.
Comes with OE Toyota (with label) tensionner and bearing, and Mitsubishi belt.
Everything in a blue Aisin box, really well packed and padded.
Next week-end my truck gets the whole thing, plus fresh coolant and T-Stat. The seals are in-stock at my local parts store so I will change them if they leak.