George Lucas himself has said that if he'd known that Boba Fett was going to become such a popular character, he wouldn't have killed him in that manner, it would have been something more befitting the character.
That's probably one of the reasons he ends up in a series of EU novels surviving and eventually escaping the Sarlaac. But he does not do so unscathed.
Check out "Tales of the Bounty Hunters" and "The Mandalorian Armor".
To throw Rhyen's thread further off track, here's one of the worst Boba Fett costumes I've ever seen:
Looks like he's got a belt and armor sized for a kid.
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