I have been searching for about a week now and found such pure AS3 UI/components:
What I'm trying to create is (Adobe AIR mobile) options/settings menu for game and depending on the size/pixel density of a particular screen
may require scrolling down options, mimicking the scrolling lists of Android with visual indicator of list location and the visual clue when reaching the end of the list
with the inertia too
MinimalComps (minimalcomps.com)
Razorberry (razorberry.com/blog/components/)
But they are all optimised for mouse clicks and use scrollbars as the interaction area for example
(uses minimalcomps, try to use it in browser on mobile touchscreen, very fiddly to use, in fact had to zoom in just to get past the conditions screen(!!))
I've had no luck finding any information or tutorial to create menu system in Adobe AIR mobile in pure AS3 (it usually just links to Flex or AIR desktop applications)
I only found one example of game pure AS3 with source to show, http://blogs.adobe.com/cantrell/archives/2010/05/my_presentation_on_multiscreen_development.html
but it doesn't show you how to implement basic touch menus/UI or interface,
Best Answer
I've been meaning to give mad components a try, they look very promising. Not sure if they'll solve your particular problem, but they do seem to outperform a similarly equipped Flex app (based on other developer's comments ;)