I'll look to Wisconsin Saw Mills, if nothing else they would know where to find a source of quanities of wood. I would also look into Local Wood Carvers.
try:
Appleton Lumber Co
(920) 734-1142 | 616 N Perkins St Appleton,
Wisconsin Wood Harvesters
(262) 593-5188 | N5683 Pioneer Dr Sullivan,
WI
Krueger Lumber Co Inc
(920) 775-4663 | 21324 US Highway 151 Valders,
WI
Dimension Lumber Co
(920) 842-2805 | 11852 State Highway 32 E Suring,
WI
Lumberjacks Hardwood Inc
(906) 863-7090 | N2509 O1 Dr Menominee, MI