they will probly hand them out a few days after the event is over thats how they already have done it normally a week after the event or 1-3 days after events end
A Circuit Spec for the Mazda MX-5 ND? That's largely unheard of. I don't think there is any MX-5 in the world that ever has a competition-equivalent model to the one that would potential be seen in The Crew. It's largely unheard of.
It seems that the Mx5 circuit spec is a recent project, the very first season was in 2016: https://www.youtube.com/watch?v=NzVDPIkQ1o4
It looks like a nice and promising race car :-)
Give it some time, it will probably be handed out at the end of the event, which is next Friday. So probably somewhen around then, with luck a bit sooner.
Look now ! I played an hour ago and was surprised to find a message telling me I had the Mazda MX5 Circuit - I first thought it was the Japanese Circuit or racing track Doh !!! but was happy to find a very peppy little racing version of the MX5 and it happily has more toe than a Roman sandle