For what it's worth, I have two (technically 3) Pixel 7 Pro's for my wife and I that I perpetually cycle through new screens every few months when one of us drops one or they take a plunge. Since almost every time I open one means a screen replacement (superb build quality), I've had the display cable holder brackets on and off enough times that two have broken so far. I ordered the Pixel 8 display bracket holder iFixit sells with fingers crossed, but it was too small. And I can confidently say a piece of cardboard rolled only lasted a week.
All that to say, I [link|https://www.ebay.com/itm/267110247370|tracked down a supplier|new_window=true], but they're not cheap. They were out of stock everywhere else in the US and on Aliexpress.