Lost characters of a private key

Format of lost key

{34CHAR}(LOSTCHAR){5CHAR}(LOSTCHAR)

Total lost characters: 13

Total found characters: 39

* I have the public address

* It was created on bitaddress in 2018, exact date available, starts with L1FA**.

I have tried for weeks with no luck. I am the owner. I lost hope on recovering it. Leaving this here for any ideas.