I'd try to make an appointment at the "Genius Bar" and talking to someone about it. If it's a common issue, they might replace it for free if you're lucky.

They generally have a tiered repair pricing model and I think minor issues like the flex cable would cost around the cheaper price you've been quoted for and replacing the whole display would be the higher price.

https://logi.wiki/index.php/Apple_MacBook_Flat_Rate_Repair_P...