Thank you for this reply!
Im actually in the opposite situation as you were in as I have a flat panel but a lot more curved donor TV around me to choose from.
I have a 65" I am trying to repair. The diffuser looked like someone took a blow torch to both ends. It was completely charred to the point that hardly any light was traveling through the screen. So from what you are saying a curved 65" would be 2-3 cm shorter than the original diffuser?
Would a gap of 1.5 cm (half since the diffuser would be centered) be too much? I assume the diffuser must sit flush against the LEDs for maximum and even light transmission.
If this is the case the only other option, other than finding a the same 65", would be to find a larger panel and cut it down to size. Cutting acrylic/polycarbonate (not sure which material this diffuser is) is pretty messy with a Dremel (either blade or sanding attachment) as the plastic metals or even a router (as it can easily chip the plastic). I tried removing the charred ends via this method just for my own edification and found this out for myself. I even sanded down the ends using 120, 240 and 400 grit paper to smooth it out as much as possible. In the end I think there was too much of a gap between the LEDs and the diffuser and not much light made it through. Although it was much better than it was when the charred remains were still there.
I read that using a circular saw with a no melt blade for this thickness would be the best way to go about it and that's what I will do next if I have to cut down a diffuser from a larger TV.
