This is a (very!). Rubber insulated leads are 35" and 45" long respectively. I haven't tested this - mostly because I no longer own a vehicle that isn't coil-on-plug.
Vintage Automotive Engine Timing Light - Allstate ? Neon ? - UNTESTED - USA
Craftsman 161.213400 Timing Light Chrome Vintage Automotive Engine Tool
Lot of Vintage Automotive Tools Timing Light Tune Up Engine Analyzer Pullers
Ignition Timing Light Gun 6V 12V Automotive Engine Timing Strobe Light Tool
12V Black Automotive Engine Timing Light Gun Inductive Ignition Stroke Petrol