kaz - 2:33 am on May 19, 2010 (gmt 0)
Tell them you will make one for them - make it a different 'color' so it is 'theirs'. Require large quantities (figure out the math so it is worthwhile) and allow them to private label it, if they do this. Then continue selling yours as you have. They can sell one in blue, you can sell one in yellow, someone else can sell one in green. Tell them you will even put their logo/sticker on it. You get the idea, soon everyone is selling yours (with various branding) to the most number of people while you make them all.