If TCM was to show the DC anytime soon, that would be an easy way to get it degraded slightly to match the LD. I've seen a Betamax tape on Ebay released back before the classic shield logo was revived, but what logo is on there is anyone's guess.
I've also had a thought to ask the fellow who posted the Italian dub of the Warner cut to youtube about getting a copy of the whole thing. It's likely not NTSC though.