There can be none in Avlee since the 0,0 coordinates are over water. I was there and no scroll in sight. Also looked at the 0,0 point in Bracada (the obelisk is almost at that point) and found none.I cot 1 in Harmondale, 1 the Messenger gave me, I found one in Tulearean Forest, 1 in Tataiia (in the middle of a bunch of trolls and 1 in Erathia.
0,0 places not checked were Emerald Isle, Evenmorn Islands, Deyja, Barrow Downs, and Eofil - must be one of them.
By the way, where does it say there are 6 scrolls . . the spolier only indicates 5 and the messenger does not tell you how many there are.
I'll keep looking though, but it is getting mighty tiresome.