Have a new never used.
Tenshock 645 prop believe it is for a 4mm shaft but not 100% sure.
Could be made to work with 3/16 if bored out.
$5+shipping.
http://i10.photobucket.com/albums/a1...1/9e5c6b68.jpg
http://i10.photobucket.com/albums/a1...1/ddf55206.jpg