The unit in your Le Mans is something you can still buy from Renault. It consists of a fascia mounting plate with a single DIN size hole and the pocket and space for the clock which you have to purchase separately.
Now as you know this was done for me so I have less knowledge than might be helpful but he did do me pictures of the inside for your perusal and the the wiring diagrams which I post below.
I have one more older style unit which is lacking the clock unit but if I can get one of these I will ask him to convert this too and put it up on here for sale.
I hope that this helps some of you, and maybe it could be added to the members section technical help.
Cheers
Jon





