No where is it mentioned that her nipples are pointed
upward. Even boobpedia makes no mention of this.
https://www.boobpedia.com/boobs/Nessa_Devil
When the best place, boobpedia, doesn't mention it, then unfortunately, no places would list similar models. Sorry.
As for boobs pointing
downward, depending on the positioning,
Lisa Ann sometimes has her left boob appear to be pointing downward.
Lisa Ann has since had touch up surgeries done to correct this.