Updated my old skin pack to work with the Kunos Miata release, added matching suits. Uploaded the psd templates along with the skins so that you guys can make your own colour combos by simply changing the colours of the layers that you want to change. Made some funky looking rims too. 
Once you download and extract the archive you will see two folders, one with the skins in it and another with the templates.
To install, simply drop the contents inside the skins folder into your miata skins folder, by default it should be at this location -
SteamLibrary\steamapps\common\assettocorsa\content\cars\ks_mazda_miata\skins
Some preview pics -
https://flic.kr/p/Th9Zu4
https://flic.kr/p/TdxCb1
https://flic.kr/p/Th9VNr
Once you download and extract the archive you will see two folders, one with the skins in it and another with the templates.
To install, simply drop the contents inside the skins folder into your miata skins folder, by default it should be at this location -
SteamLibrary\steamapps\common\assettocorsa\content\cars\ks_mazda_miata\skins
Some preview pics -
https://flic.kr/p/Th9Zu4
https://flic.kr/p/TdxCb1
https://flic.kr/p/Th9VNr
But I believe the rim blur texture on my old rims are broken. If they are, then you could easily remake similar rims from the psd I provided in this new one's download.