Hi,
I have already done what it is you are trying to do for another client of mine. I cannot give/sell you the code as they own it but i can create something like it for you if you want. Take a look at my website foe an idea of what sort of projects I have taken on and drop me an email/PM if yo want to take this further. I should ask firstly however is this for a one off or the start of something commercial.
Cheers Pete.