Did some further research adn found just as I said they are MAZDA derived numbers. With no USA apps. Here is why.
They are NOT new KIA CORP nu,bers but OLD KIA corp before HYUNDAI. When it was a FORD/MAZDA DNA arm-wing. Which made the Festiva/Fiesta/Aspire and Courier P/U as well as the MERC Capri conv.
The old still in use KIA 0 K9D0 33 28Z front pads and 0 K9A0 26 28Z rear pads are
Mazda K9D0-33-028 may have Z or not it is hard to tell from the USA and my personal data base.
Mazda K9A0-26-028 may have Z or not.
Kia took which is common practice in mnay marker and mess with teh basic number to KIAize it for use form OEM Mazda parent sequenceing. may get teh Z to make it made form a different vendor then OEM Mazda one too. Like OEM Mazda is ATE and KIA versions are AKI-BONO.
so Kia made it by adding a 0 and then K9D0/K9A0 and then 33/26 and then dropped the 0 and added a Z and got KIA brake pads and such which were based off maybe a Korean market Mazda 121/222/GLC/Protege or some such car.
Hense 0 K9D0 33 28Z and 0K9A0 26 28Z. Best bet is to order form KOREA for that car useing those numbers and upgrade there as you like not here and bite the bullit and pay the outrageious shipping and customs fee to get them here. Or have them bought there for you and shipped here to you FEDEX or UPS non business class pacakge. And hope they do not flag at customs xray and nail you fees that way.
Between a rock and hard place is really the bottom line I think. Welcome to grey market cars in USA. If your Elan was not such an odd ball here it might be a little easier but not much if it did have rare chance of a USA FORD/MAZDA/KIA brake system use somewhere since 1975. A ELAN just gives it a whole new set of fun to deal with. You are really now driving a one off like a 1969 NOVA with drum brakes all around. Gettig shoes might be very interesting for that now too. And custom made useing the old SHOE metal hard part and relined with new friction material. The same might be true for you ELAn adn its disc pads. Reuse the old pad backing plates and reline the friction material at a CUSTOM race car brake shop.
But might be cheaper to pay the Korea to USA FEDEX/UPS and get the right stuff faster first time. And less effort too. Order sit and wait put on. No trial and error and grinding the first set they make for you.