Miscellaneous: Griffenne blood drop rate

[Diogene]

Wiki & allakhazam mentions Griffenne Blood dropping from Griffenne, griffon, griffawn.
http://wiki.project1999.com/Griffenne_Blood

I tried to farm this several times for hours on end, and only griffennes seem to drop it (drop rate is really really low). I also commissioned other players and they never got back to me with a drop from other griffons or griffawns. Only griffennes. This is right now almost impossible to farm this for the qeynos cultural armor. That is a big bottleneck. Can a dev confirm it is actually dropping from griffons and griffawns in North Karana ?
If not would it be possible to modify this ?

Kindly