Hard rubber track guide for hanging Stylmark mirror wardrobe doors

Hi Guys,

Do you happen to have (or know where I can buy) rubber track guides for what I'm thinking is a 1970s vintage Stylmark rolling wardrobe door? The rollers have "Stylmark" imprinted on them, and hard rubber track guides are attached to the bottom of both doors. A bolt on both lower corners of each door slips through through a hole along the tops of the rubber guides. Two are worn out and I cannot seem to locate replacements anywhere.

Thanks so much for any assistance you can provide.

Marlin