Sliding Door Roller

Hello. I am hoping to replace both sliding glass door roller assemblies for my International sliding glass door. I have attached images. The body appears to be about 2-1/4-inches long. The body appears to be about 1/2-inch wide, but taking into account both dimples on opposite sides, the body appears to be about 3/4-inch wide. The track on bottom of door into which it slides appears to be about 3/4-inch wide as well. Only one wheel per assembly. It looks like your 81-139, but that one appears to be 3/4-inch wide before taking into account dimples, but I am unsure. Thank you for your time. I look forward to ordering replacements ASAP.