Yep S.G. was many years ago, I think a few of the Countdowns survived (the ones you see occasionally on Rage) because the producer grabbed them out of the dumpster and put as much in the boot of his cara s possible!!!!! The ABC would of kept most "event" type Countdown shows- Awards, the 10th anniversary show etc but compared to the hundreds of episodes not many exist.
A lot of tv stations wont hand over the performance rights, and there are always ten bands wanting that one spot on the show.....
so its a fine line....(and a bit of a stupid one).
The really early Enz Countdowns would of been great, our video stuff is in really bad shape but they were such great performances.