This is a vag plug with the parts number 4D0803583G
I know it fits Audi A4 B7, but it might also fit other cars with a 30mm or 30mm holes in general maybe.
WARNING, one file that I provided is very close to the original but I could not manage to print it out well, so I made one that prints out easier, but if you wanna give the original a go, go for it I guess.
This part should be printed in a hard TPU, if its to soft its just gonna fall out. might work with hard plastic if you manage to get good enough adhesion but I doubt it.
hope this part can help someone else
The author marked this model as their own original creation.