Opportunity is missed by most people because it is dressed in overalls and looks like work. - Thomas Edison
What is your concern with outsourcing?.....Turn around time?....Costs?.....Many suppliers print bumper stickers with HP Indigo Presses and buy material in mass quantities....So quite often you can buy the finished product for the same or less than doing it your self.....I use www.stickerman.com www.tradenetcatalog.com or www.stouse.com
http://www.rolanddga.com/products/printcut/bn/