25 line drawings to illustrate 5 common business themes

I need 5 line drawings/cartoons for each of 5 themes - I have identified key descriptors or similes for all of them (for instance, 'Framework", 'Acrobats', 'People facing a narrow bridge over a chasm"). Each drawing must contain 2 or more figures, using a common style across the whole set both for the figures and the contexts. The drawings will be used as background slides/ supporting images in a website, so need to be supplied as .png files, black lines on clear (transparent) background (and royalty free, of course!). See attached file as an example (though this only has one figure...)