AJAX - Build and customize online store, required immediately

I have a site with lens theme installed ([login to view URL]) I need help with some custom coding, mostly adding buttons to the navigation (If you look at lens theme, instead of text on the navigation, I require image buttons instead). I have loaded the site with all the products, and require someone with masterful ajax skills and theme modification skills to change a few page elements. The lens theme requires only minor tweaks, so i think this will be easy for someone with a lot of experience. I have a 36 day deadline due to other freelancers being incompetent and wasting my time. Please take this into consideration, as I am at my limit in patience, budget, and time. If you think you can deliver, I can provide you with any info you need. Thanks