Good morning form down under,
***Sadly Samsung and their fold displays are really difficult to work with and the parts would be too expensive if you found them on ebay***.
Even if you try to put it into ebay it's only going to come up with screen protectors (Not the actual screens). I think it might be worth another go with samsung support otherwise if u have the cash to shell out for a new one u can possibly try open this one and take the parts out. Besides, the outer screen works perfectly right?