Got fed up waiting for Xreal to release proper light blockers for the One Pro glasses and will be using them on a sun holiday next month so made my own. I printed mine in PP filament and needed to scale them up to 102% to get a good fit, took 3 different variants to  get the fit right, if you print these you'll probably need to go through some scaling depending on which filament you use, PP shrinks quite a bit when  it cools. I also heated the blocker up and applied to the glasses while still quite soft to form it to the frame a bit. Result is quite tidy looking and seems to stay on well, hopefully will be able to withstand October sun in Rhodes.