It's many years since I've had to replace a screen on my Plus 8 but from what I'm aware, I'd use laminated glass. From memory, toughened glass is used for passenger side windoows and the like and in designed to disintregate into granular pieces to avoid serious cuts and lacerations. I used to go to a decent automotive glass fitter experieced in glazing caravans etc. Make sure that the rubber seal is used, not plastic foam or other weak material otherwise the flexing of the screen surround will cause the seal to 'walk' resulting in a non-seal. Make sure that the 2BA screws go back in in the same order (shortest at the top and middle, longest at the bottom.
Not sure about getting a tinted screen; you can only ask.
Could you fit it yourself? Probably with some Fairy Liquid, a rubber mallet and a little bit of patience!
