try this guy:
https://986forum.com/forums/performance-technical-chat/87685-i-want-modify-electronics-my-car-how-do-without-dying-attempt.html
he sells dimsport which is one of the platforms you might want to consider using to get your dme back up and running, and seems to know how it all goes together. not certain if he's still here though; sounds like he made some posts that got stuck in moderation which is a forever wait on this forum. note that the dimsport device is $1500 and i think the data is more $ but not sure. ecudoctors would be half that ...