Replacement Glass Door Slider Tandem Rollers

A home owner from Tuscon AZ says:
I've pulled a pair of roller assemblies from my Winchester Tri-Pane Glass Door Slider and they match up quite nicely with your P/N 81-018 , with one exception. The two mounting tabs face the opposite direction. Instead of being at the bottom (near the wheels) they're at the top. Can you provide replacements for these? If you would like me to send a photo, please e-mail me. (Your "image upload" application isn't working properly.)
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Bob from SWISCO responded:

Thanks for posting. Sorry to hear our website didn't accept your photos. However, I'm wondering if what you need is our 81-141 . Take a look, go over the dimensions, and let me know what you think. 

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