Buchmin Industries top & bottom track

Hi, I recently moved and the previous owner removed mirrored gold/brass doors to one closet. I'd like to reinstall them and I have the doors, but not the track. I'm looking for the top and bottom tracks that fit Buchmin Industries z97.1-1975 doors. The photos are from another closet in the residence, so I'm guessing I need a similar set. The wheels are concave. The bottom is 3in wide with only two raised tracks running along it, about 1.5in apart. The upper is about 2.75in wide. Could you point me to the correct set to purchase that would fit a 70in wide opening?