Hi Sir,
I Have read your project description. I understood your requirment. i have 6 year exp. in opencart. All my completed projects on freelancer.com are on Opencart. You can see my profile to know clearly about this: https://www.freelancer.com/u/sprextech .i have seen it attached file, and understood, recently i have customised it one opencart netherland website, i will do that work perfectly.
Please feel free to contact me and we discuss about your project.
Hope to work with you.
Thanks
Sprexe Technologies