Some other things to check. Since it's 5 and 2, I want to guess it's coil pack wiring related though.
Shorted/rubbed wires to the 5 - 2 coil pack
fuel pressure
Pcv valve
Valve clearance
Power and ground for the ECM
http://www.ncttora.com/fsm/1996/SIL/techinfo.toyota.com/ileaf/02toyrm/02toypdf/02rmsour/2002/024runne/sa/ras/comp.pdf
The bearing retainer and abs sensor wheel are described as non reusable parts on the above page.
I couldn't get the one I was working on off, had to cut it.
If you measure...
I've got one here in Rochester.
Have you tried calling an O'reillys? A lot of them have a bunch of tools you can check out for free. Might be worth a call.
Just a little way down on the page are some discounted online dealers.... since you're here on mud, might I suggest, cruiserdan.
https://forum.ih8mud.com/95-gen-toyota-trucks/341631-3rd-gen-4runner-faqs.html
:cheers:
The slip on rotor would be able to move with the tire removed. Lift up with tire on and check for bearing looseness. Also, rotate everything by hand while off the ground and try and isolate the noise.
This should get you started.
http://www.ncttora.com/fsm/1985/1985FSM_OCR.pdf
Digital copies can be had here..(I think it goes back that far)
https://techinfo.toyota.com/techInfoPortal/appmanager/t3/ti?_nfpb=true&_pageLabel=ti_home_page&SMENC=ISO-8859-1&SMLOCALE=U
Also, check your local...