I don't recall a similar problem with Lionel O-27 or O gauge track.
The same issue is present for Lionel 027, 0 and Super 0 track. Curves are plentiful and hard to sell. Straight tracks are what most people want.
Might as mention, in my experience, the same is true for slot car track made by Lionel or Atlas in both HO and "standard" scales.
I imagine its no different for Aurora .