Any roller skaters here?

Wife picked up some cheap Chicago Skate 4 wheelers. Bearings are crap! 608Z with a built in bearing spacer. I tried some ABEC 3 skate bearings out of some old roller blades in there but I need a spacer. Is there a standard sized spacer I need to install regular skateboard bearings? It looks to be about .250 on an 8mm ID.