There are virtually no production daggers 8" or over. 7" seems to be the limit.
Scorpion knives makes one,
It's the knife issued to Brunei military personnel, and you can get a blade of 8", 10", or 12".
I was thinking of getting one. Still might, though at >$300 with 420 steel they seem a bit expensive.
http://scorpionknives.com/brunei_kris.htm
Scorpion knives makes one,

It's the knife issued to Brunei military personnel, and you can get a blade of 8", 10", or 12".
I was thinking of getting one. Still might, though at >$300 with 420 steel they seem a bit expensive.
http://scorpionknives.com/brunei_kris.htm