Help!!!!! How To Separate Buckets Seat Tracks

I finally decided to get working on the seat tracks again. I drilled out one rivet yesterday and got the track apart. Here is a picture of the cage that was in the track. The little ball bearings fell out. The cage was bent. I straightened it out a little and put the bearings back in. I think this one should be OK. I need another to get this track back together.