ladies and gentlemen!
Very often on my job I meet the following requirement from the client, when developing android applications: \"make it look like and iPhone app\".
There is no iphone UI library for android that I know of. What you can do is, get the iphone GUI psd and redo it for 3 sizes of android (for the 3 size ranges) and use the elements of these psd's to theme your application.
I get these kind of similar requirements. Sometimes it wont be much about the looks but about the navigation flow of the application and how new views or activities are animated. From my experience, there is no easy way to do it. So I end up making a lot of adjustments and hacks to get the job done. And I over bill the client. :)
Btw you could also consider libraries such as Sencha Touch, it will look the same in all phones that use a webkit browser.