I have found the "I rather be driving a Titleist sticker" at higher end courses/pro shops such as TPC Scottsdale. I know at locations such as these, the stickers are no cost. I would say any location that is an authorized Titleist retailer should be able to order these for you. Hope this helps.

What is a titleist sticker? Any good golf shop has bumper stickers that say( I'd rather be driving a titleist #1 ball in golf.) I have one on the front and the back.

do a search on eBay  I've found the Titleist  logo sticker there,  comes in different sizes and color