What about Moby Dick?
Okay that was a fizzle.
In all seriousness, though, I'm not sure. This is one of those things that I wouldn't waste too much time on. I believe many things get corrupted when humans get their little hands on things - which is what ultimately happened with Ishmael's line. I can't speculate as to where that corruption happened.
As to your question Arnie - I think God is apt to let us stew in our muck sometimes. Ishmael was the result of people not trusting in God. I think God blessed him as a lesson. His progeny continues to be a thorn in the side of Israelites (and many Christians). Note how Ishamel went on to have 12 sons (Genesis 25:16), for example. It's a parallel to Israel; don't think there is not a purpose in that.
The important thing is that neither Ishmael or his descendants are exempt from the offer of grace through what Jesus did on the cross. Could Ishmael have been saved? Absolutely yes. Do we (currently) know the answer? No.