Hi - we have an old Fourco Cleartemp sliding glass door that needs new wheels for the track. It's big = 8' wide [2 - 4'panels]. I don't see any other markings on the door itself for a differetn name than what is etched on the glass. We think your model #81-005 looks like it might be the right match but would like your help to be sure. Please email or call with any assistance. Thank you.