mirrored closet doors, track cut thru for 6",

I have one pair of closet doors that need a new track. The old track has worn completely thru for about 6". The track is gold colored, 61" long, 2 19/32" out to out, for concave wheels. Wheels are 1 1/4" diameter, metal case is 23/32" thick, 2 1/2" tall, 1 3/16" wide. There are no markings of any kind. The house was built in the mid 80's.
All the rollers seem to be good, but they are metal and have cut thru the track. Is this usually the case? The doors are fairly heavy because of the mirrors. Can I use the old rollers with the new track?