We have made a bulk buy of cork flats and tubes. We have 10# bulk boxes on sale for $55. Thats only $5.50/#.
Small Bulk Box of cork tubes will have tubes between 2" - 6" diameter and 12" - 30" long. Boxes will average 8 to 12 tubes.
Flats Bulk Box of cork will have flats from 4" - 10" wide and 12" - 30" long. Boxes will have average of 6 to 10 flats.
Pictures are examples of each box.
http://www.coldbloodedsupply.com/categories/Specials/