I love the idea of Boba being trapped in the Sarlacc for an extended period and even only recently getting out (perhaps when the sarlacc is killed by a Krayt dragon or something).
As for the armor: I could imagine the sarlacc doesn’t enjoy digesting all the non-fleshy bits of its victims. Perhaps it pulls stuff like armor off and regurgitates it out. Of course the Jawas would know this and they’d go hang out collecting the regurgitated goods anytime jabba had a good old fashioned sarlacc execution event.
I also love the idea of Boba being taken in by some Sand People and nursed back to health once he does escape. Man, this stuff just writes itself!