I'm not sure if I can accomplish the search fields element. I'm not that good with actionscript, if you have an example of a similar banner or a working demo that would help immensely.
If you want an example of my Flash work.
ModifiedMotors.ie - Modified Motors Magazine. Ireland's Finest Modified Car Community. News, Feature Cars, Events, Galleries, Forums, Babes, Jap Imports, Modified Cars, High Performance for Sale.
Has a banner for Modified Motors Live 2008. I created those banners. You might need to refresh the page a couple of times for it to be displayed.
What kind of budget are you looking at?