For free? good luck! Seriously though a few auto junkyards will take them for around $75 per ton. Give a few around you a call. Best bet is to put it on ebay at $1 and have some sucker come pick it up.
There is a place right outside of Bridgeton, you'll have to ask around, I was there once and this guy scavages and sells parts on Ebay, it is really a junk yard for boats. It's on the river side, like I said, I found it by accident one day, good luck.
The place outside of bridgeton closed up. That was great place to get parts i went there 3 years ago when i neded to get a flywheel for a merc outboard. I went by there last year and the place is closed up. They were on the end of the river and the place was a mess.