Thanks for the reply mate!
It definitely has 12v to the coil +ve while cracking, triple checked this today.
The colours in mine aren't all the same, but it follows the same setup. I've been testing 12v and continuity all day and I'm sure it's wired the same as your diagrams above. I'm leaning towards a faulty coil? As I can't get it to arc at all. I found a guy nearby selling a bigport coil and igniter for $45, I'll try pick it up next week.
I appreciate the photos you've sent through so far. If you have any other valuable info/photos, it'll be greatly appreciated! might even help someone else 10 years from now.. lol.