Somebody was born into a culture that has no knowledge of the Christ - could he still "find him"? If somebody 

a) has no access to the Bible or any other written document on the Christ
and b) has no chance of hearing of "him" through the word of mouth either (because he lives in a culture that has no knowledge of the Christ, for instance), could he still "find the Christ"? 

Is there any Christian denomination that would say "yes" and how such a person could "find the Christ"?
Mormons would be one to say yes. According to LDS belief, any who die without a complete or necessary knowledge of Jesus will be taught about Him in the Spirit World after this life, where they may choose to accept or reject the gospel. (This is why they build temples: to redeem the living and the dead.)

On a related note, they also believe that Christ came to more than just the Jews as in the Biblical record, citing John 10:16 and the Book of Mormon, indicating that there may be more people who know of Christ than we think.