I found this link for you in forum Ash. http://www.activeboard.com/forum.spark?aBID=121380&p=3&topicID=20708099 It has several peoples way they do it. I just typed "limbs" in the search bar.
I have used a fine gavanized wire, in the casing, put quick dry glue like e6000, on and then put a few stitches here and there along it to hold it in place. Worked for me. XXXXX June.