Hi,
I can help you with this one for sure. I have a team of web designers and developers and had worked with opencart before.
So, if you're interested then just drop me a pm or add me on Skype.
I can provide you one stop service which includes web design, web development, graphic designing, image resizing and image retouching including clipping path and clipping mask.
More over, there will be content writing and any other services that you can think of; I'm there for you.
So, drop me a PM and I'll be all over you.
Cheers!!