To simplify - your only option for high quality is the laserdisc. It’s better than videotape. The GOUT on DVD (sourced from those laserdiscs) is obviously the most conveniently available version. It was released for a limited time in 2006 as “bonus” discs with the 2004 special edition. You can find them on eBay and occasionally they pop up on Amazon and similar sites. The resolution on all those is noticeably not good on modern large screen tellies.

In all honesty, you’ll do your family a disservice showing them laserdiscs or DVDs when you’ve got the Despecialised Edition available. I do understand the need to have something “official” though!