I don't know about that in your area, but around here I either would collect them myself or find like-minded individuals who would do that. Given the (lack of) care that most people exhibit in recycling, I'm not sure I'd want just anything that came from the recycling facility. Could you post wanted ads on sites like FreeCycle and craigslist and/or post ads in food co-ops and garden centers?
Check with your local paper and find out where they dump the extras from the newspapaer racks. Some places recycle some don't. There is still a tremendous amount of waste here in Central Texas. Read the post of recycling boxes on this forum and ask some store in your area to act green. Presenting it this way and trying to make it easy for the business may get you and others all the mulch underlayment you could ever dream of. They pay to throw it away but that doesn't mean all are open to the idea. Happy Growing David