I purchased this in May 2017 and fitted it to my MK1.
The unit works very well. I am not a techy bloke so I have included below a link to MX5 Parts from where I purchased the unit.
I have recently replaced the unit as I have gone “retro” and fitted a Clarion Cassette Unit.
Therefore, I am happy to offer this for sale.
I would like £30 + postage costs (£5?)
https://www.mx5parts.co.uk/r671-ipod-phone-head-unit-p-2180.html?