I know some of you guys hoard parts; here's to hoping someone has an extra pair they would be willing to let go of cheap? New/Newer used are pretty expensive...
Worth a shot! My local pull-a-part hasn't had any 1.8 miatas up for a while (though I haven't checked in a few).
I have the stub axles for the 94-95 miata.
i.e.:
https://treasurecoastmiata.com/i-11635398-1-8-cv-axle-94-95.html
https://treasurecoastmiata.com/i-11635395-1-8-cv-axle-95-5-05.html