Featherlite FL26 weed eater bushing question

I have a Featherlite FL26, the bushing that attaches to your flex shaft and then you screw the weed eater head to has wallowed out on the inside, allowing play in it, and it will work it's way off the flex shaft, causing the head to quit turning. Does any one have any idea what this bushing is called or where I can find it? The only thing I can find on parts websites is the dust cap which actually screws over what I need.

Number 6 (shaft) or 7 (Flex Shaft) I think you are talking about is the Shaft. It should have the bushing inside of it.
WEEDEATER Trimmer Drive shaft/handle/shield Parts | Model FL26 TYPE 1 | SearsPartsDirect