I used the fan/shroud assembly from a 1995 3.8L Taurus and it blows like a hurricane. No overheating issues at all. I had to do a little bit of trimming on the shroud and it fit perfectly. I have a few photos in my gallery and I also had a post with reference to it.
3.8L Taurus Fan
I picked the fan up cheap at a salvage yard and so far so good. But if you'd rather you can order a brand new, after market replacement on Amazon.com for $92.59 with free shipping. It's comes from Dorman (part# 620-101). I also got a variable speed controller from Flex-a-lite (part#31165) It cost me 4 times what I paid for the fan
Good luck!
Mike