You could find a grassroots project you'd like to fund (billboard, facebook ads, newspaper ad, magazine ad or mailing project like the super brochures) and sell the shirts - promising that 100% of the money collected from sales will go towards said project.
Could be a 2 birds with 1 stone idea.
Get the T-shirts out promoting Ron Paul and fund a project that promotes Ron Paul even further.
If you don't want to handle selling the shirts yourself than maybe RonPaulProducts.com would agree to take them from you and fund a project with their sales money. They're the ones sending out the super brochure, so it would probably be easy for them to take the sales money directly from the shirts and put it into the brochures.
