How to Determine Patio Door Brand?

I live in a 1977 Marlette mobile home. I need new roller assemblies for my double glass patio sliding door. I've found a web site which sells assemblies for many different brands but cannot determine the brand of my slider. All the assemblies look somewhat alike so I can't guess which one!
The only name I can find anywhere on the door is "Central Glass 76" on the spacer between the layers of glass, but no other info on the door anywhere.
Help please!
Thanks, Dave
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Door sliders come in a plethora of sizes, types and styles. Best is to take the door out and remove one and measure it and see if some one near you has a replacement. Or call a door pro and let them fix it for the price they will get.
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