Yep, there's a small possibility that some bacteria on unwashed fruit contains B12 if they were grown in animal manure, but not enough to meet anyone's needs by any stretch of the imagination.
You can find vegan B12 at many health food stores for reasonable prices, and places like Whole Foods, and heck even Wal-Mart. Make sure it's 1000mcg and preferably sublingal (melts under your tongue). I've had my current bottle for so long though that I don't remember how much I paid, but definetely not more than $20 for six months worth.