Mirror closet roller and bottom track

A home owner from Colorado says:
Hi there,
Looking for one of these rollers and the 72" bottom track it would go on. I have 3 of the 4 rollers. Thanks!

D/M3137028 A/S 3097401
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Bob from SWISCO responded:

Hello there. I believe this is just the inside portion of a roller unit. See our 81-258 . Look it over and see if this would work for you. 

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