I made this model for a friend of mine who's removed the armrest in a Fiat 500, since it wasn't as comfortable as she's hoped. This model is quite large, the size is due to the hole on the driver's seat leather that has to be there so that the pin can hold the armrest in place.
It has a tight fit so that it doesn't slide off the pin.
The g-code I posted here worked for me, but I would recommend to slice the original STL and make a g-code file yourself, just to be safe.
The author marked this model as their own original creation.