Looking For a Shopcart that mirrors WordPress Theme

I am currently running WordPress 3.3.2 through Hostmonster along with zencart. The site owner picked out a DynamiX theme for the site and has enlisted me to find a new shopcart that is compatible with WordPress & Hostmonster and that can mirror the Dynamix theme.

Trying to figure out if it is possible; has anyone else done this? Even if it’s not possible with the selected theme, would it be possible with other themes?

For the most part I want to say that the themes are directly coded for WordPress and, unless tweaked heavily for a new plugin like Opencart, can’t mirror the theme, but thought I’d shoot the question on here to anyone of higher knowledge. *bows*

Any shopping carts that can do this?