Personalised product preview

Hello. I'm building a magento site for stationery (virtual products). I have no need for inventory so would like to use custom options for cards rather than configurable products (too many combinations). I need a custom option that gives a personalised Product Preview. Here, customer would be able to change the colour of the card background, add their own text and be able to change the font type and colour. (Similar to Aitoc's Custom Product Preview but with slightly different functionality). This must not use flash. Requirements: - Admin to use custom options to upload variations of background colour images significant to each product - Admin should be able to define the editable area for text - this should allow for more than one field as products differ from on another. - Admin should be able to enter sample text into these fields which should serve as a guide for the customer's customisation - Admin can upload fonts which can be previewed on the front end - Background colour and font colours should use predefined swatches rather than a spectrum picker. - Customer then saves preview and can then add to their cart