Indeed, I would too! I did not mention "Twilight's Last Gleaming" because its ownship is uncertain also I believe. I have a Fullscreen LD of it released by CBS/Fox, & I doubt that Fox owns the releasing rights.
HBO do release many of their films on DVD (for example, they have "Path To War" coming next week), and they're pretty good at getting the best of their back catalog out. Living in the UK, I'm not familiar with "By Dawn's Early Light", but it sounds interesting. I'd certainly investigate it if it does get a DVD release.