Rarely you might find someone selling display assemblies online. Don't recall if they include the ribbon. Easier to find a parts Pre 3, imho.
I've heard warnings about this for the Pre 3 and Veer. People hear the clicking of the display ribbon not seated properly inside the device. Sure enough, disassembly shows what you say: it's folding over incorrectly and fatiguing the cable.
From the disassemble pics you can see the cable is in reality a bunch of smaller ones together. In mine I can clearly see that 2 of those little cables are now "looser" than the others, I suspect they were disconnected from the main connector.
Will browse the web for someone selling a Pre3 for parts.
I'll keep trying just for the sake of it, my sister was the one using the phone at the moment and really likes it.
great job. the speaker contacts are very slight and ;pretty easy to break upon disassembly. Had to apply solder to make the contacts work again. My screens were new and I had to initialize them in order to get the touch screen to work.