If GJ just tweaked the engine pylons on their 747-100/200, they could sell a million. BA, TWA, HP, UAL o/c, CO n/c, NW red/gray, there's lots of famous well-known schemes for which DOZENS of planes flew in, not just a bunch of one-offs. Hey, how about a JAL oo/c 747-200? There were like 5,000 of those fyling around... Half of them were the airline's flagship/symbol. I mean, a BA Landor 747 *IS* BA for the 80's. Same with a twin-stripe TWA 747-100, or a UAL o/c 747. And there's still a lot of NW red/gray ones flying around that aren't -400's.
We need more TWA twin-stripes!