ultron used the vibranium that was already there. he must have used it to make another body. when he finally went into his new body. for more clearence, ultron flew back to the hydra lab (while still in a warped drone body) to get vibranium. then he made his body.
Evident from his glowing eyes and silvery hair, its Simon Williams aka Wonder-Man
Avengers Vol. 3, Issue 38 cover; click image to enlarge
He appears later as well in the same issue:
Avengers Vol. 3, Issue 38 Page 5; click image to enlarge
The only on screen conversation we have is between Bruce and Tony when they're having a little bit of a verbal contest.
Bruce Banner: Ah, see. I don't get a suit of armor. I'm exposed, like a nerve. It's a nightmare.
Tony Stark: You know, I've got a cluster of shrapnel, trying every second to crawl its way into my heart. (points at the MINI-ARC ...