I managed to lose all my metal gear inserts. However, they don’t sell them separately. So, would anyone be willing to send me some? I live in Vancouver in case you are wondering.
I would really appreciate it. 
Unfortunately, I do not have any spare gear inserts to send. However, you can use some axle locks, spacers, screws and nuts to create a similar effect as pictured here: Dropbox - Error - Simplify your life
That’s what I have been trying to use. Unfortunately, half the time the axle locks don’t fit on the axle…they are just too small. Thanks for suggesting, though.