Standard clipart is usually not a very detailed drawing. Mostly they are images that have little detail or are outline drawings. The standard clipart is for use on the web to use in documents.
The craft stamp industry is very large indeed and most people are still buying stamps that are mass produced because they don't know how to get a 'custom made' stamp manufactured. So if you are into card making or scrapbooking and want to find that 'special stamp' you should find yourself a manufacturer, it doesn't matter where they are in the world as unmounted stamps are thin and lightweight and can be posted easily.
Do not clutter up your projects with too many different baby clip art pictures. This can look messy and unprofessional. Also, you need to pay attention to things like size, color, and format. There are many design tips that you can refer to on the Internet.