Here is where you'll find some unusual parts bargains, electronic and otherwise. Along with some optics and top quality gauges.
Shipping is at cost.
Click here for semiconductor data finding secrets. . These started out life as outrageously expensive ignitor cables for jet engines. Fully shielded, about two feet long. Looks like it can be adapted to regular ignition use or for custom shielded high voltage setups. Probably will fit a stock spark plug.