DVD + R DL

[staples.com]
25 Pack Sony Dual Layer DVDs (8.5 GB> $39.99
http://www.staples.com/webapp/wcs/stores/servlet/StaplesProductDisplay?&langId=-1&storeId=10001&catalogId=10051&productId=163173&cmArea=SEARCH

[circuitcity.com]
25 Pack Memorex Dual Layer DVDs (8.5 GB) $39.99
http://www.circuitcity.com/ssm/Memorex-Double-Layer-8X-DVD-R-32025712/sem/rpsm/oid/199231/rpem/ccd/productDetail.do