They are still available new if you are willing to pay the price. Bret Instruments in Santa Ana, CA did repair them at one time. I'm not sure if they are still in business, but I did find a link to this place which may be related:
http://www.fuelinjectioncorp.com/store/index.php?main_page=product_info&cPath=6&products_id=427
They have them for Mercedes, VWs, etc. so I would think they can rebuild one for a coupe.
Hello boys is there anyone who know where i can buy a map sensor for a d-jet system or where there is someone who can repair a one !!!!!. have sought nearly everything but without success.