Hi,
my name is Sue and I'd like to offer my services to you and help with your animated HTML5 banners. I work in Adobe Edge regularly on projects very similar to yours. Please check my profile page for testimonials of my past clients: https://www.freelancer.com/u/SueKocian.html
I can create the 300x250 banner over the weekend as suggested and finalize the rest of the banners very quickly as well. I estimate anywhere between 10-15 hours of work to create all of the sizes.
Here are a few samples of banners created in Adobe Edge that I had on hand:
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If you have any questions or would like to discuss your project with me further I'll be more than happy to help.
Thank you for your consideration.
Kind regards,
Sue Kocian