Hello,
With some 38 freelancers bidding before me, I think I am a bit late coming to the party here. :-)
In case I'm not and you do get to my bid, here is what I propose:
I can use a responsive WordPress theme (similar to the sample sites you've provided) and build a full WordPress site using the content from your existing site. A major benefit of this is that you would be able to easily udate/manage/maintain it using the friendly WP Admin interface.
I have done this sort of thing before, so I speak from experience.
Kindly review my profile and if you find me suitable for the job, please message me here for further discussion.
With best regards,
Richa Varma
BE(IT), MBA(Marketing)
Freelancing Web Dev/Tech WAHM