There are names De Gea and Kepa who are one of Madrid's targets in some reports but this is still limited to rumors that could indeed be this just to increase news traffic.
As usual after Mbappe and madrid became traffic for the media now looking for a replacement goalkeeper for Courtois Lunin will be good traffic for the media too, I personally might be more suitable to replace Courtois Lunin is David De Gea because I think he deserves it compared to the other 2 candidates , because as far as I see David De Gea probably has quite a lot of experience and playing hours at MU, so maybe he can play better in Madrid.
But it all comes back to Madrid's management, maybe in the near future they will definitely take quick action to temporarily replace Courtois Lunin to start the La Liga match which will not take long to start in the near future. but I think De Gea is the right choice for Madrid