One of the best ways to encourage or attract more spam to your email address is to post it or include it in a web page. TxtNinja has the answer. Convert that text into an image and TxtNinja makes this quite easy. TxtNinja has a simple interface, you can choose what Font, Size of font, Color of text and Color of background.
Once the image is generated, you can access it one of 3 ways. There is a direct URL to download the image and use as you wish. There is Forum code that can be copied and pasted into posts at forum sites and possibly other sites, blog, etc, where you can post information. There is also HTML code that can be pasted into web page source code.