I got tipped off by a member that this thread was sitting here with no answer...
Again, TW: Please send us PMs or pick up the phone & call. We don't really spend time here on TW, other than answering PMs and updating threads we started, so I never saw this one.
Now, that said -
Icon has received so many questions and requests about this, that they now offer their coil-overs with 14"x700 lb. coils. There is an extra charge of $175 (I think) for this option, but they will come from Icon with these springs already installed. This goes for both 1st & 2nd Gen Tacoma.
Hope this helps, and please PM/call us with any other questions you may have.
-Marco @ DSM
Edit: I forgot to add that they're using Eibach coils. Eibach had discontinued the 700 lb. coils recently, but due to overwhelming requests,they began producing them again.