The NA shift linkages work fine. I just made a short shifter adapter plate from scrap aluminium plate and it saves the missing gear issue.
I've just fitted gabriel shocks front and rear to my AW11 (road car) and its stiffer than the Mrs MX5 and close to my old V35 with 350z bilstein's. A good shock for $100 each.
OEM Brake pad replacements are cheapest from Brake Bits in Knoxfield Melbourne.
Black prothane bush kits (including everything but rear sway bar body mounts) are $130 shipped from amazon.
Major radiator hoses are $35-40ea shipped from amazon.
Cams approved fire extinguishers come on special every second catalogue sale at supercheap for 40% off. The next cycle is just after christmas, there will more than likely be a heavy weekend sale in the next fortnight too. It's well worth working out the supercheap cycle because you should never pay more than 25% less than the sticker price of SCA branded stuff, and twice a year each item will be up to 50% off. They will replace any SCA branded item that fails, regardless of warrantee, because its an in house brand that they have to back. Remember, regardless of how "****" the stuff is, it MUST meet worksafe and other regulatory safety standards, so why pay eleventy billion dollars for something rated to 10,000 tonnes when you only need 3.