I made this simple phone mount for a volvo v70 p2. It has a 15mm ball joint like the mount i made for the can am maverick. The mount goes into the slot some volvos have next to the radio, and is a press fit. the press fit is more than enough to keep it in place. I've included stls for both a blank mount, and a mount with the volvo logo. Feel free to remix this and modify it as you please, but do provide credit. 

NOTE: the volvo logo is a very tight fit, so you need to apply a considerable amount of pressure to get it into place. But hey, atleast it won't fall out :D

NOTE: the bad top layer was caused by my printer, and will not occur in the .3mf, or when you print from stl.