I can recover up to 22 missing characters in a few hours. Missing more than 22, I can try and recover up to 25.
Two limitations, the characters missing need to be at the end or in the middle.
~
And you must know the public key
Can you give a demonstration?
5JCbb1
????????????????????S2osDc4M4rqwjX1P1MeNArc1f
04B637A820B12A5578A6141DAE3EE8295FF11DC7C44DD289E35ECBC1C5E3D1BECDB042B2C892305
7E740E5086229FB5D9FD58F8EDBC66E046D3BE296EB84898680
we can discuss specifics and then settle on price.
I'm not paying for this, but if you can restore the missing 20 characters in a reasonable amount of time, it proves your service works.
Note: the address is not funded.