Just looking at the compression readings I'm tempted to say you're problem is limited to cylinder #2 and I would exclude the head gasket as you usually get low readings on adjacent cylinders (#1, #3 and #4 appear to be ok). Since you said plug #2 is just oily, I would say you might end up having two unrelated problems: you might need a valve job and you have a leak in the coolant system. But that could be just a swag (Scientific Wild Ass Guess)...
For the special tool, you can check with
Baum Tools If you want to exclude the contamination of oil and coolant all together, I would recommend getting a sample of oil and send it out to
Blackstone