Bought from Rainier Arms, for sale is one new unused LMT full-auto bolt carrier group. Complete with bolt, firing pin, cam pin, etc.
http://www.rainierarms.com/?page=shop/detail&product_id=112
Bought it a few months ago and it has been sitting in a box ever since…was going to be used for a build that never got off the ground.
Price is $100 SHIPPED via USPS Priority Mail w/ confirmation.