Best guess on the BE supplies, items only show up there in the following Act, and not in the current one you are in.
I don't think it matters if you are full rival or friend
As per the guide here:
Act 3
Felendaris
#1: Sundermount (Pride's End - Quest: A New Path) - Right next to the idol
Quest info: This is a companion quest for Merrill.
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Top 4 
Mass Effect 2
Dragon Age II
Skyrim Elder Scrolls V > working on Dawnguard
Mass Effect 3 (oops not getting this one)
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