Oil Pump Assembly – Need Help Finding Part Number

Good afternoon, guys.

Hope you’re all doing well. I have an '04 4Runner V6 with a head gasket issue that’s been lingering since 2017 (1GR-FE). Over time, I’ve been purchasing the necessary parts. Head gasket kit, timing chains, guides, tensioners, sprockets, water pump, and thermostat.

I finally took it to my mechanic to get the work done, and he recommended replacing the oil pump.

Here’s the issue: I can’t seem to find a part number for the complete oil pump assembly. I do see they sell the oil pump rotor set (PN 15103-31050), but I’m unsure if that’s all I need.

Can anyone confirm whether I need just the rotor set, or is there a part number for the full oil pump assembly that I should be looking for?

Thanks in advance for your help!

PS 1: I am currently living in the country of Panama. Got here from Colorado in 2017. The local Toyota dealer is super expensive and parts will not be here for 4 months. So I have to get my stuff online. It's much cheaper and faster.

PS 2: I originally posted this same thread on toyota-4runner.org. Posting here as well.