Where can I find the lastest plugin to covert to IOS?
you are looking for an air sdk to add to flash pro?
I can only remember is that when you created a flash file you can convert it to IOS for apple. I think the converter/plugin was used to make it HTML5.
you want the createJS extension: http://www.adobe.com/products/flash/flash-to-html5.html
If, as you say in the title of your post you want to "convert to iOS" as opposed to publish HTML/CSS files then why not just publish as AIR for iOS directly from Flash Professional?