I made my own Lastu skin for one of my Jollas.
A very thin piece of veneer out of a parquetry kit. Stuck double sided tape on one side then marked out the locations of the camera lens and flash. I cut the shape to size, just a bit smaller than the back of the phone so it left a thin strip of white showing around the edge.
I then punched the holes through with hole punches, peeled off the backing of the tape and stuck it to the back of the Jolla.
Did this about 3 years ago and it's still stuck.