Since I got a great response from the community,
I decided to 3D print and sell the grip that I have made.

I am selling a small number of grips in physical form. For people who want to 3D print their own grip, I am also selling the original CAD files (.IPT and .STL in high quality) as a digital download.

For more information, check the products page.

Update July 15th: Check out a review of the grip by Ivan from Camerahoarders in the video below!
Thanks Ivan!