Sliding glass door roller with flat nylon wheels

A contractor from Virginia Beach, VA says:
I order from you all regularly and did not find a part I need in your catalog, I did not know if you might have it. I am looking for a two wheeled roller set just like part# 81-018, however the one I need has flat nylon rollers. Thanks for your help, Brian
Customer image of their sliding glass door roller and track.
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Donna from SWISCO responded:
I believe we can supply the needed replacement, I will post again as soon as they are available.
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Paul Sr. from SWISCO responded:
Take a look at the newly added patio door roller 81-151
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