Post date: Jan 22, 2015 7:31:46 PM
1/22/15 saw an ebay listing "black dense foam". they laminated 1/2" and 3/4" pieces.
>> 5 PIECES POLYETHYLENE FOAM BLOCK 13 ¾" Long x 10" High x 4 ¼" DeepLISTING IS FOR ALL 5 PIECES WITH FREE SHIPPING.The block has been professionally made from 5 sheets of ¾" and one ½” sheet of material glued together to make a Block of 4 ¼” thick.