Talking Avatar for Website

I need an experienced animator or designer to create a talking avatar or professional looking person for our law firm website. I need one character that greets visitors when they come to the website and another that thanks them when they go to the contact page. I need this avatar to not repeat itself everytime the same user visits the homepage or the contact page. Just the first time they visit the page that day they hear the audio, unless they refresh their browser. The characters have to be black females in professional clothing. I want them to look human, not like a drawing, unless it looks like a real person. Please review [login to view URL] for examples of what we are looking for. I currently have a website, but I am having it rebuilt and I do not know what system it will be in so please make it compatible with a flash website as well. I want to be able to upload my audio file to the animation. SERIOUS BIDDERS ONLY! MUST BE ABLE TO COMPLETE THE PROJECT IN 1 WEEK. IF YOU BID FOR LONGER YOU WILL NOT EVEN BE CONSIDERED.