I have a product that MLMers may be interested in, how do I market it?

How do I market to MLMers and home-based business network marketers? I'm looking to get my product in front of them somehow. I've thought about going to hotels and looking for meetings, but that seems like a shot in the dark. I have been posting craigslist ads. I know how to get contacted by them if I'm looking for a home based business, but I don't want to be disingenuous or unethical. (Don't even want to advertise my product here, I'm looking for actual help in marketing.) FYI, It's a business card, and I'm a graphic designer. Ideas?