Hi,
I am well aware of the FACT that you are looking for a SYDNEY guy, but trust me, if you just read my full proposal, you will be impressed with me!
Now, you have a large website that is 98% done and you need to fix HTML/CSS issues you have on the site. Well, that is really a strong side of me, I am a well-versed front end developer with extensive knowledge and working experiences with creating HTML5, CSS3, Bootstrap based websites and also fixing simple/complex issues on many websites. So, I can definitely help you out.
Now, regarding the SYDNEY fact, if you please check my profile, you will see, 2 of my last 3 completed projects were for a Australian client and he is really happy with my works. Also, I am only 4 hours behind from Sydney time, so I can start early in the morning when your official hours (9 or 10 am) starts.
Also, please check the following Freelancer.com project, this client was looking for a Eastern European or North American designer, but finally chose me and his project is 95% done and he is truly happy with the output.
https://www.freelancer.com/projects/Website-Design-Photoshop/mobile-application-designs-Long-term.html
So, I request you to send all the files you have and the list of the tasks to be done and I promise you that you would not be a loser. :)
Thanks.