Someone at a Danish forum made me aware of this bargain at dvd112.com.
HP 16x DVD+R/DVD-R non-printable
168 DKK for 100 pc cakebox
188 SEK for 100 pc cakebox
HP 16x DVD+R/DVD-R full face white inkjet printable
188 DKK for 100 pc cakebox
208 SEK for 100 pc cakebox
Prices are excluding shipping (75 DKK / 125 SEK for up to 5 kgs).
I have no personal experience with this site, but from the address it looks like might be the same as BurnaLot.dk and Billigmedien.de.