Seat Track Lube?

If there is enough heat under your seat to melt grease, call the fire dept. LOL
You can use white lithium or basic bearing grease but use it sparingly.
Why ? Its not the lack of grease that causes binding but the dirt and sand that will collect in the grease. If you've taken the tracks completely apart for renew,
This is no doubt what you found. No more than a seat is moved a dry lube like graphite powder would serve the purpose.
Now are they all the same ? No. Earlier seat tracks had steel roller cages. At some year model those cages were changed to plastic. Most common failure of the plastic cage was at left front corner. If you have broken plastic cages or not they can all be replaced with the steel cages ( same shape and size ) if someone here has them.