I saw the post above saying "I successfully replaced a friend's broken nylon roller on a Grant 336 slide with a Swisco 7/8" Flat Shower Door Wheel
10-109 . I drilled out the riveted mounting post for the broken wheel and mounted the Swisco
10-109 using a 8-32 x 3/8" Phillips screw. The nut on the Swisco
10-109 had to be ground down about 3 mm to provide clearance to the mating slide.
So I did what he said and it worked great! I ground the Swisco down only about 2mm. Thanks for the suggestion.