https://www.ebay.co.uk/itm/184527971663
What I've got in all my 75s now, only negative is having to buy a radio block adapter and attach the loom to it. Half an hours work but still a pain.
Used with the mg7 radio trim, absolutely perfect. Yes it's basic, but runs anything I need, and in 2 or 3 years when we get cheap units again I can just swap them out and not be £xxxx's down.