seat tracks

[six-tee-nine]

Has anyone here ever managed to rip these apart?

My rails still move but due to some rust wich is formed in the rail they don't roll smooth anymore. The problem is, they're riveted to the upper pads wich are mounted on the seats.
They don't slide apart off course, ok I could drill the rivets, but can get them together in a decent way afterwards?

Any body done them before or has any tricks to help me fix this?

[onebadmopar]

 i tore mine all the way down had to cause i had 2 right seats couldnt find left seat tracks so i built a new base  and reinstalled the tracks on them .. lot of drilling but it worked out fine i simply bolted them back together holding up good so far