I have a California car cover for the Charger, and it is a good cover. Had the Charger stored outside for over a year with the cover on it.
If storing where it is windy, mine did get blown partly off and rubbed the paint when I only used the center tie-down holes. A few extra straps or ropes around the trunk and hood should help keep the cover from rubbing and blowing around.

I also bought one of those 7-layer car covers off E-bay for the Jensen, and it is actually pretty nice, but I haven't used it outdoor for more than a few days.