MSD make a universal lead kit for LSx motors. It comes with a range of different boots and the LS1 coil boots and a crimp tool. I just ordered one from Summit as it will save me cutting up these good leads.
The price is better than I paid for the last set of custom leads I had made and with them I had to supply the old leads so they could reuse the coil boots.
Red Super Conductor Gen III LS-1/6 V8, Universal - 32079
MSD 8.5mm Super Conductor Spark Plug Wire Sets 32079 - SummitRacing.com
Cheers