I usually find them to sales in the wimborn slave market, but is kinda easy to find them in Elven Grove... five runs should be enough for you to find them, though is called "elf patrols", you can find dark elfs, tanukis and drows... you will only lose reputation with amber if you rape/kill (not sure about kill) or capture someone after saving them from wolfs, defeating and capturing patrols will not reduce your reputaion with amber.