Just to be clear, spark gaps should read open circuit when doing a resistance or continuity test. You will probably need to pop out a leg to test them properly (just in case something else is in parallel with them). I don't think I've ever seen a failed spark gap without other obvious damage (burnt tracks etc).
Anyway, if you are sure that it is these parts that are faulty, then going by the red - black - red stripes, BK12010002 looks like it might be a suitable replacement.