I looked at the picture and it's not exactly what I'm talking about.
The preluber from Amsoil is basically a pressurized tank that stores pressure from when your engine is running and then releases the pressure when you turn your ignition on before starting the engine next time.
I'm asking about the much more expensive pre-oilers that have electric pumps built into them.
Dana has one where the electric pump will turn on even while your engine is running if it senses a drop in oil pressure as well as pre-lubing your engine on startup. See link
http://www.dana.com/Automotive_Syste...tlubemain.aspx
I also found this one for almost $600. I couldn't find the price of the Dana preluber and I don't think I'll even ask.
http://www.enginegearonline.com/proilchsy1.html
I assume that no one around here has the pump type of pre-luber. It may be a bit accessive for a 4runner anyway. Most applications for this type of preluber seem to be large deisel engines.