So the Elvis jumpsuit used to be everywhere in the Sims 2, and I had a great one (I think I got from here actually) that Goopy wore. You know the suit...The famous Elvis suit. But now I can't find it anywhere, not on MTS, not anywhere. Does anyone have one or know where one is. I need it for my storyline.

You mean this?
http://www.modthesims.info/download.php?t=220974

I think Candy had a different one. I've been looking, as well, and it's really hard to find anything good, these days. So many of the sites have closed down. But that's the one she wound up using for her story.

Once upon a time, there was a cool, spangly one that looked like the real jumpsuit. Ah, well.