Hi there,
I've done a number of pure (non-design-change) conversions in the past and so can turn this around for you quickly. However I will need to see your current site before confirming I can start. Please view my portfolio, reviews and completion rate to see I won't let you down. I live in Canada and speak perfect English. I can produce the converted site on your hosting, or on my dev server for you too.
After conversion (or during), if you have other requirements such as fixes, or there are parts of your site you want "widgetized" or "manageable" in some way, then please let me know and I can quote on those. Please note I do usually convert most things such that they are manageable, but for a full management (theme) dashboard with lots of options, that can add some expense.
Kind regards,
Chris