Prototype #1 of the SADForce LS coil harness is up for sale. I ran this on my car for a couple months including 2 track days. It will fit a 2001-2005 non-Mazdaspeed, and you'll need a standalone ECU like megasquirt to make it work. This is not the final version - unlike the final version this is set up to only run batch ignition (the only plug and play option anyway), and it's consists of the OEM GM harness plus a patch harness.
This includes a set of 4 used LS coils, a used OEM LS harness, and the home-made prototype patch harness. I bought 8, and 4 are in my car running well. The other 4 haven't been tested, but presumably they are similarly awesome.
$100 including shipping for the full package. You just need a SADfab or other mount and plug wires and you are good to go.

 

Wont work in MSM?

 

Should note this will actually work with MSM as well

 

PM sent

 

Sold!