if anyone is on snow leopard/leopard/lion pls pls pls upload your spacer I don't like the new one so if you could do that or find a way for me to get it pls tell me
I hope this helps. Not sure if what you want is the invisible spacer between dock icons or the divider at the end of the dock, near the trash can?
The following is for invisible spacers between icons:
Open "Terminal" and copy the following:
defaults write com.apple.dock persistent-apps -array-add '{tile-data={}; tile-type="spacer-tile";}'
Press enter/return
Repeat the above for additional spacers. When finished type the following:
killall Dock
Press enter and then drag the invisible spacers to desired place. To remove them simply drag off the dock.
I hope that helps.
I have just done this myself (in Snow Leopard) and it works, however I wonder if anyone knows how to get a smaller spacer, say half the size?