Originally Posted by Tyrantus
Joel Dirt in the Lab sells Oleander also, although not always, thought you might want to add this to the list.
As for the official guide being wrong.. I think some of the discrepencies can be seen in my guide as well from person to person. Some people have said they found a particular item in one place while I may have found it elsewhere. Hopefully if anyone sees a double location for any of these (finds something in a place I don't have listed) just let me know and I'll add it like I did the rest. I have confirmed everything on the list myself (hell most of it came handwritten while i was playing) but I do know there are multiple spawns/possible quest rewards for at least a couple of items~