I just ordered an Aisin kit from rock auto since aisin makes the oem kits for toyotas. To my pleasant surprise it had a hand full of oem toyota parts in the box but the pump was aisin branded and the timing belt was mistuboshi.
I wouldn’t see an issue with going with the aisin kit I did but being that it’s such an invasive job it’s one of those things that you really only want to do once and be done with it because of the amount of work to get to the water pump and belt.