For starters, try the coil pack troubleshooting in Techinfo. That didn't work for me, as my last bad coil would only fail after the car warmed up. I needed a megohmeter, but only had one available at work, and didn't feel like walking across our huge plant to get it.
If you know your wires and plugs are good, the coils are the next logical step. A wrecker may let you borrow a set to see if it works for you, hoping that you'll buy them. Most wreckers will sell you the ICM and coils complete for about $100 US, but there'* a world of other opportunities for you if you don't need the ICM.
The 1997 SSEi uses a different coil than all the earlier L27, L36, and L67 cars. I THINK it'* a hotter coil, similar to the MSD. I almost went that route, but the MSD has had good success in our cars (one failure that I know of) and the Accels are known to have problems.
I just couldn't justify spending 100 bones on used coils.