I am going CRAZY trying to find an aerodrive stem for a medium-sized Giant Trinity Advanced SL.
Giant retailers in NYC just say “huh?” when I ask if they can order this part. The googles are no use. Am I totally out of luck? Please tell me no.
I am looking for the “middle position” stem for a medium sized frame, to be exact.
There are some listed on ebay. I think they are called nosecones or cowlings in the item description/auction name.
Yeah, I’ve been reduced to circling ebay like a vulture. Of course, the model I need is the one everyone else is most likely to not want to sell. 
I have literally not talked to a single Giant dealer who knows what I’m talking about. They go to Giant’s own public-facing website, see no Trinity stems, and then conclude that the part must therefore not exist. Kill me now!!
Go to a different Giant dealership. I have purchased them before.
BTW they run about 250 bones!