You mean the spark plug socket won't fit in the hole around the plug?
If so this is also a problem with 13b turbo motors. The casting around the plug won't allow the use of a normal socket. You can buy proper mazda one for doing this but they do cost a fortune, most rotary owners/workshop just get a normal plug socket machined down until it fits in.
So.... if you've got any mates who are right into 13bt's ask them if they have one, alternatively you might be able to borrow one from a rotary workshop. Because they're machined they are slightly weaker so if you can borrow one don't be suprised if the say "you break it, you bought it". :lolcry: