I’m pretty sure there’s more than a few people between this forum and Fanres that can capture LD AC3 just fine. We have LD AC3 captures of all the 1997 SW trilogy Special Edition 5.1 audio tracks, and the 1999 TPM 5.1 as well. If you were willing to lend your LD to someone with the equipment, I’m sure they’d be more than willing to capture it for you.
Great. I never said you couldn’t. I just think the extraction process wouldn’t be worth the effort due to quality degradation.