I just happen to be anal enough to have a list of what arcane scrolls you can get and where (that are all placed) prior to exploring the temple (other than Falrinth's area of the 3rd level):
Burne sells: blink, blur, charm person, chill touch, color spray, cone of cold, detect magic, dimension door, dispel magic, fear, feeblemind, fire shield, hold monster, grease, ice storm, identify, invisibility (greater), invisibility, mage armor, magic missile, melf's acid arrow, lesser globe of invulnerability, protection from arrows, ray of frost, read magic, remove curse, resist energy, see invisible, shield, shocking grasp, sleep, slow, teleport, true strike, and web
In the moathouse you will find: animate dead, cat's grace, charm animal, knock, protection from evil, ray of enfeeblement, and stinking cloud
In Nulb, Lodriss and Skole sell some that are already mentioned, plus fox's cunning and lightning bolt
And when you kill and loot Falrinth's area of the Temple, you'll be able to find some duplicates of the aforementioned plus burning hands, hold person, and mirror image.
