From where and is there a p/n on an invoice?
Heres an Image from Toyota of the Asian pump. Take a look at the impellor and finish work.
No obvious marking on the images I ran across and I didn't pay attention when I installed my last one.
Well, as with Amazon, Ebay is a roll of the dice since both are full of knock offs and counterfeit parts.
In this case all you can rely on are reviews of the seller and they can purchase positive reviews.
Not same motor but my Aisin kit came with the brand marked clearly on the top right. The casting on Rock is a lot nicer than yours. I don’t buy genuine parts from AMz or fleabay. Rockauto is the source for the kits.