This is the kit I bought:
http://www.acehardware.com/product/...07&cp=2568443.2568445.2598559.1304000.1260261
I actually bought two. The kit comes with two electrodes.. the metal rod housed in porcelain that the spark comes from.. one of the electrodes is as pictured in the photos..long and bent downward. The other electrode in the kit is short and stubby.. I could have made it work, but I liked the longer bent electrode, and I also wanted an extra length of the Nomex sheathing. I figured an extra piezo wasn't such a bad thing either.
If you do an image search for piezo igniter, a ton of stuff comes up.. the components in the kit I bought seem pretty ubiquitous and are sold in various configurations under a number of names. Point being, you may be able to find better/cheaper alternatives. Restaurant supply companies can be another source.
The parts I got lent themselves to easy installion.. the electrodes have metal mounting rings... a bit like a figure 8. So drill two holes as in the photos.. one for the electrode, one for the rivet per burner. Bend up an Al mounting bracket for the button, drill two mounting holes for the rivets as in photo. I then cut the wires shorter and shrink wrapped the joints, slid Nomex over, and done deal. I mounted the button so it is flush with the stove body when fully extended... cleaner, no breaking/snagging, etc. So 6 holes, 6 rivets, and a bent up piece of Al.