I am pretty sure you can buy bulk vacuum line hose material from Toyota in rolls. I think I heard this from car care nut . But.. I could be wrong.
If so, I am sure we can learn or find the process on how they form those vacuum hoses bends. At least I hope we can.
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7 3rd gens listed in the build thread (2 are parts mobiles)
Build Thread:
https://www.toyota-4runner.org/3rd-g...os-builds.html
Brillo's Bucket Fluid Ex changer:
https://www.toyota-4runner.org/3rd-g...ml#post3358086
Sparks Plugs Wire and Coil Information:
https://www.toyota-4runner.org/3rd-g...on-5vz-fe.html