First off, don't expect QFM pricing for any of the previous suggestions or mine.
They were cheap for a reason. You may have never experienced it because a stock NA8 is simply not fast or heavy enough, but the friction material on QFM's had a tendency to fail and break up before wearing out. I had it on the front and to a lesser extent on the rear of my current lightly modified NC2 and there are plenty of complaints about it on various car forums. All the other suggestions and mine are a far superior product to anything QFM had.
Winmax W3 will fit your bill.
This is a made in Japan quality product.
Can be bought online through Spares box or Carsmods Australia. I've done both.
The distributor is in QLD, Motorsport Brakes, but no longer sells direct. Bellow is the site with all resellers.
https://www.motorsportbrakes.com.au/dealers/Sparesbox has Winmax on sale right now, but not the front for you application. Front right now are $220 and rears are $184.
Using these right now on my lightly modified NC2.
I would also suggest Carbotech AX6/Gloc R6 for your purpose.
Ignore their website saying they are unsuitable for track, No problems here.
These were perfectly suitable on my Standard NC and Standard ND.
Very easy to clean the dust off. Had the PITA to clean BBS rims on my NC(LE model) so this was a big factor for me.
The 1521 road pad was fine in my NC on the rear for track day use.
The only problem is the Australian distributor does not offer AX6 as they did many years ago. Only the far more aggressive XP10 and 12 and the full road pad 1521.
That leaves you having to source them from overseas where shipping becomes a cost contributor.
There is a negative for Carbotech/Gloc. They use rivets to hold the friction material to the backing plate, so forget about wearing them down to the backing plate useless you want score marks in the rotors from the rivets. From memory you will have about 3mm left when the rivets touch the rotor.
I know Hawks have come up and they will be cheaper than the above 2 but I personally will not use them again.
I have no issue with the braking performance of them in HP+(only drĂven others people cars with HP+) and Blue(overkill for your use), but did hate 2 things.
1 The rotor wear is excessive vs the above 2 brands.
2 The dust is black and corrosive when wet. Will basically turn to rust and etch into the paint of your wheels.
BTW, do not try Hawk HPS as a track pad. Was no better if not worse than Mazda OEM on a standard NC. Don't know about the newer HPS 5.0 but I gather it is not much better.
There is a brand I have been wanting to try but have not had a chance to yet that Brakes Direct in QLD sell.
Forza.
There FP3 grade looks suitable for your use. FP2 would be as well but not available in your size.
They are $180 for your front and back size.
https://brakesdirect.com.au/aus/catalogsearch/result/?q=vehicle&make=Mazda&model=MX-5&generation=1989-1997%2B%2528NA%2529&engine=1.8L%2BPetrol%2B%2528NA8%2529