Yes, I linked to it on Amazon (~$109) in my post above as did Dr. Coffee (since RockAuto charges shipping, it's essentially a wash). But be aware that you'll need to remove the old pump from the housing and install the new one as shown in the illustration.

Also note the two-stage fuel filter system; the one called "fuel filter" is in the housing (pic in my previous post) and then there's the one which comes with the fuel filter and kind of resembles a coffee filter. So if you want a new fuel filter too, you'll need the housing, which is Toyota p/n# 2330050120. I paid ~$ 38 at a dealer's online parts store.

so, is there also a fuel line filter, or is the pump filter the only one? i'll have to look upon the part referenced, but does it include the sub tank? and replace the sender as well while in there?

The only fuel filters are the two in the tank, the one in the housing and the one on the bottom of the fuel filter. I would definitely replace the sender given the difficulty of getting to it and the seeming inevitably of eventual failure. OEM is ~$100; can't remember if aftermarket is available for less. The sub tank is not included and there is no reason I'm aware of to replace it. I didn't.

looks like i can get the whole shebang for $320 from the dealer (2003-2009 Toyota 4Runner - Fuel Pump - Toyota (23221-31050). good value? probably more than piecing it together, but one stop shopping and guaranteed.

I know your post is a few months old so I am not sure what you decided to do but I am also looking to replace my fuel pump. After some research, I believe the part number and price you listed (23221-31050 for $320) is just for the Denso pump and not the entire fuel pump housing, sending unit, filter, etc. Did you order this part and if you did, can you confirm what you received?

I found part number 7702035112 which appears to be everything included for $643.80.

I am still debating on what to do but I am thinking $643 for the entire unit is way too much. I am thinking I may just replace the pump and sending unit. I thought about also doing the filter while I'm at it but there's some more info on the filter in this thread that's making me think it might be unnecessary:

Servicable Fuel Filter?

Either way, its still < $300 if I source the pump with strainer (Denso from Rock Auto), Fuel Sending Unit, Fuel Filter and a new Tank Gasket (all OEM from my local Toyota dealer).

thanks for the question. as not turns out, i did not have to replace anything. earlier, i had thoroughly cleaned the throttle body. i DID NOT DO ANY RESET AFTER THAT. apparently, there is a recommended procedure to do reset the computer. i just kept driving it. took a good while for the symptoms to disappear. btw, been running strong and smooth since.

so, you may not need to replace anything either. do the throttle body cleaning first.

What are signs of failure?

Do you have any advice for taking the assembly apart to put in the new filters, fuel pump, and level sending unit?

I've seen a lot of videos and writeups for how to get to the fuel pump assembly, but not much about how to take it apart after that. I don't see anything about it in the FSM either.

I don't. I took mine to a shop and they did the assembly.