Another source... www.meritline.net sells Verbatim DVD-R DL in case you want to shop for best prices....many prefer Verbatim for -R DL
http://www.supermediastore.com/dvd-plus-r-dual-double-layer-section.html http://www.meritline.com/dl-dvd-r-double-dual-layer-dvdr-dl.html There are a couple of difference varieties of the DVD-R DL listed at the urls provided, above.