My original parts broke so I decided to copy it.
Please note that you will have to use your old spring.
In order to attach the "grip" to the "front" you will also need some pins (I used 2,5 mm diameter). Depending on your printer you should drill the holes again.
I suggest using ABS material for this print, so that you can use some acetone to improve surface finish.
Let me know if this worked for you ;-)