A few days a go I noticed one of the bushings in the wing mechanism was falling out and the other was gone. I went to the auto parts store and got some fuel line/vacuum hose. (7/16" or 11mm O.D., approximately 7/32" or 5mm inner diameter).
I cut it to 1/4" or 5mm wide. I put a little silicone grease on them and put it on the pins where the originals were. It's working fine so far.
Here's some pics: