Hello,
I'm Serhii Kniaziuk (+2 EEST)
First of all, thanks for the detailed description
I reviewed the opencart extension you mentioned. I can create a wp-plugin, which provides the same functionality for the woocommerce. Everything would be placed in one plugin with its own admin-section and an ability to activate/deactivate the extension.
Now, shortly about me:
I'm 9+ years php/js/html/css programmer. WP/Joomla and other cms, frameworks and custom programming, including base design and "psd to html" work. Created more then 20 wp-plugins and customized hundreds.. I'm new at freelancer.com (only 1 month), but already did one more wp-plugin (similar to your project) and customized a few others for employers from freelancer.com . You can check feedback left for this work in my profile reviews.
So, if you have questions, please be free to ask me.
Have a nice day!