I've been farming Reapers in Beaucedine Glacier for about 3 hours now, and have only found Absorb-Int and Absorb-Vit. No scroll of Stun so far...
I'm switching areas.
Same thing happened with Escape. Tried farming it from Banshees in Delkfutt's Tower (middle) with absolutely no luck (for about 3 hours also) and then killed 3 Banshees @ night in Qufim and got it.
Edit: Tried Gustav's Tunnel just now, got Absorb-Agi and Stun in about 1 hour, ~12 kills.
Edited, Jun 14th 2012 7:34pm by Roller