Hi Ralph
I have a X98 Pro having similar problem. Received just before christmas and after a few days saw some flickering lines (up to 4 lines) in different colours. Have been in contact with seller (Shenzhen OKQI Electronics Mall on Aliexpress) and got the same suggestion as you – try too find local repair shop to start with, but as you I have not found anyone willing to do this yet.
Also the screen has changed so that I know only have one fixed black pixel line always shown on the screen.
As you, I have started to consider if it would be possible to replace screen by oneself – or at least start to check the screen connector connection. Then again it seems a bit strange that the screen connector would be the cause of a single dead pixel line – seems more as a HW failure.
So I don’t really have any additional input to you other than that I saw that replacement display are available at aliexpress for around 70 dollars.
Have you had any more feedback from your seller?
/Johan