1962 aluminum sliding door replacement rollers

A home owner from California says:
Can't find any markings. The house was built in 1962 by an architect/engineer. The sliding glass door is original to the house. It is 2-panel 10' wide, 78" height. Don't know what rollers to order if these are even made anymore. Any feedback would be much appreciated. We really want to keep the slider. A new one would stand out like a sore thumb in this beautiful original mid century house. Thanks!
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Casey from SWISCO responded:

Hello,

Take a look at our 81-082 roller and see how the dimensions compare to your original hardware. Thank you!

81-082 : Patio Door Roller Assembly, 1-1/2
Patio Door Roller Assembly, 1-1/2"dia. Concave BB Wheel
81-082
$13.20
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