The only 4-6-0 (non-Annie) chassis that Bachmann has left that's liveried with the Christmas colors is the #90033... still a bargain at $30! It should fit the #90076 loco, and the new chassis has the better-looking Walschaerts valve gear.
http://estore.bachmanntrains.com/index.php?main_page=product_info&cPath=66_69_148&products_id=4094
Good luck!
Jay
http://estore.bachmanntrains.com/index.php?main_page=product_info&cPath=66_69_148&products_id=4094
Good luck!
Jay