I just did this repair on my van, for spacers I actually found a piece of aluminum hollow round stock that was 1mm thick and 10mm outside diameter. I cut pieces to size, and they fit nice and snug inside the bolt holes, leaving no room for play between the bushings or the bolts!

I didn't space my front bearing forward, but found it was still a good fit. Doesn't seem to be pushing on the motor. I also had the motor out (just finished a JDM swap), so maybe it ended up a bit further back on its mounts instead?