I have the below in mine and its fabulous, (Mine was Bose) everything works from the steering wheel. phone connects in the glovebox and not a cable in sight !!..downloaded the waize app for satnav and the whole set up is better than the one on my 1 year old Mondeo. Looks factory fitted too. Paid £238 for it during a Halfords sale after they accepted my MX5 club discount.
https://incartec.co.uk/product/FK-262