Thanks to MakingZone's PSvita grip and providing me with the source files, I was able to modify it to suit a Sony Xperia Z3. A much cheaper alternative to the GCM10 Game Control Mount.
I recommend printing with 100% infill to make this part as strong as possible. I also used 2 rubber bands to make a tight solid fit to my controller.
Fixation_XperiaZ3_v1.4.SLDPRT | 589.5KB | |
Fixation_XperiaZ3_v1.4.STL | 479.6KB | |
PSvita_grip_with_dualshock_4Support_bas_v3.STL | 502.7KB | |
PSvita_grip_with_dualshock_4Support_haut_v3.STL | 417.5KB |