I have been running the Flex-a-lite . Black Magic e-fan in my '90 3.0. since '98 w/o problems. I wouldn't run anything else. I did try one from Kragen, it was supposed to be 2500CFM but it made my truck overheat. You can wire up junkyard fans, but for a little more than $200 the Black Magic comes with everything you need, as well as mounting brackets to fit the Toyota. Summit Racing usually has them the cheapest. You don't want anything less than 2800cfm

If you are having cooling issues right now, you need to fix them before changing fans, an e-fan (or any fan) wont solve a non-fan overheating issue