Not a Toyota part number but If you cant find Toyota injector harness pig tails to replace the ones that are so easely broked on 22re injectors here is a general motors part number with better weather seal boot that will work.
I used these to replace all 5 of the injector plugs on my truck while I was doing the engine swap they will also work for about half of the other sensors on the engiine.
GM part # 12085491
Discription: Connector
on toyota and lexus connector they usually have a five number stamp on the back of them and if you ad this other five number in front 90980-xxxxx is usually the part number for that connector not all connectors have those five numbers