Spark plug dilemma (efi+N20)

Hey guys hoping some of you spark plug experts can help me find what I’m looking for. My problem is my 408 eddy headed is going to be sprayed with a 150 shot, so I require a cold plug that’s NON Projected. Easy enough, but I also run a self learning efi system that requires you to run a resistor type spark plug to prevent emi RF noise.
I’ve exhausted myself trying to find a plug that’s both non projected, resistor, 5/8 wrench.colder temp With no luck.
I’ve also tried to find NGK resistor caps but can’t find any in Canada and summits said their not allowed to **** NGK to Canada (not sure why)
Anyways hopefully someone here might be able to help me out.
Thanks guys