There was this article about 6 Heretics (Lewis, Martin Luther, Augustine, William Barclay, John Stott & Billy Graham) Who should be banned from Evangelicalism.
That article has lots of errors, which has been rectified by someone else.
However, Lewis' view on inclusivism is quite clear, in his book Mere Christianity:
There are people who do not accept the full Christian doctrine about Christ but who are so strongly attracted by Him that they are His in a much deeper sense than they themselves understand. There are people in other religions who are being led by God’s secret influence to concentrate on those parts of their religion which are in agreement with Christianity, and who thus belong to Christ without knowing it. For example, a Buddhist of good will may be led to concentrate more and more on the Buddhist teaching about mercy and to leave in the background (though he might still say he believed) the Buddhist teaching on certain other points. (178)