Don't listen to them... they don't know about Wetsuit Elena, she is a skin for the people of Naughty Dog only,
but no one from Naughty Dog plays Uncharted 3 and that's why she hasn't been spotted yet.
There are rumors out there that something went wrong during the porting proces of that skin, and now she is assumed to be disformed.. other skins only got a downgrade during the porting proces, she was just one unlucky girl. Still is.
The reason wetsuit elena is not in Uncharted 3 is because it does not fit in the Uncharted 3 universe (Typical ND response)
The real reason is that if anyone took the time to examine U3 Elena and her skins to the U2 equivalents they'd be so disgusted at how dumbed down and ugly they are in comparison that they'd never wish to put a wetsuit on any female again. In some cases going as far as never wishing to see a female skin again.
That's my theory to what happened to the guy in charge of female skins and why no Wetsuit Elena/Rika Raja in the game. Pinkerton's not in just to cover up no Rika.