Originally Posted by CliftonGK1

It's not that they won't be available. It's that a lot of shops are stocking fewer and fewer 9spd parts for immediate availability. At our shop, we have plenty of 9spd cassettes in a variety of ranges (and 8spd, and even 7spd freewheels). We've got chains-a-plenty, and quick-links up to our ears. But you'd have to do it as a special order if you needed a 9spd STI lever. Not sure about other shops, but we tend to stock what's on most of the bikes we carry, so we have mostly 10 and 11 spd stuff in stock now.