Check out www.flyinmiata.com they,have turbo kit's for the miata. also, Jackson racing make's a supercharger kit for the miata but, i don't have any link's for you for the S/C kit try doing a google search for the S/C kit.

About the body kit i have no idea who make's a, wide body kit for you car.

I really like the way the www.racingbeat.com body kit for the miata look's. it's simple and tasteful.

hope this help's some.