Mobile Cart Template

I need an Open Source cart integrated into a mobile template (mobilecartly is one choice). It can be any template as long as the CSS holds all of the formatting. That way it can be changed to fit other mobile templates or easily integrate into them. Also I wold like this to fit into any desktop site as required. Again only CSS integration will be acceptable. That way I can copy the cart CSS into the existing desktop site with some minor edits. I need this to be in HTML and CSS only. The budget is what it is so please don't ask for anymore or try and charge anymore. If you can't do it for the price then please pass this one by! There is no negotiation. I'm also open to a PHP cart that you may have but it has to be transferrable as I'm not looking for monthly fees. I've had a look at the mobilecartly code and it seems simple enough it's just time as to why I can't do it myself so I know what I want. I have the funds in the account so this can start within a few days for the best price. There would be lots of other work for my chosen developer. Thanks