Prolly why you haven't heard much is they rarely if ever do a new trainer for a 4 year old title. Especially considering how busy they are with all the new Early Access and Beta games flooding the scene.
You might wanna ckeck around at some other sites if your heart's set on it.
I have found nothing for it. I have looked on different websites. With the game being a 4 year old game they would only need to have 1 trainer for it. i do not see the game getting any updates.
I feel your pain bro but I just doubt it will happen. The Retired list is FULL of games a lot of people would like to see another trainer for. I've gotten in the habit of looking here for a trainer before I buy a game. YMMV.
If you feel that strongly, you could submit a request.