autozoo no longer carries gloplugs of any sort up here.

You can get bosch from napa, for similar $$ as here. also checker and oreilly usually have autolites in stock for $10.

I lost all 5 GP's last january, of course when I was away from home overnite. had to change them out outside in -7*F temps plus wind. I used autozoo bosch plugs. I have replaced 4 of them since then.

I test GPs a different way, too- you do not need a meter. I use a test lite, but a length of wire works as well.(the test lite eliminates using a wild hot wire, as the bulb will lite up if inadvertently grounded)
unhook the GP's from the relay. run a hot lead to them. if they throw sparks, they are good. no spark- bad. this test will not show if you have a GP shorted out. but it has always worked for me.

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1984 123.193 372,xxx miles, room for Seven.

1999 Dodge Durango Cummins 4BTAA 47RE 5k lb 4x4 getting 25+mpgs, room for Seven.