Patio Door Replacement Roller

I am hoping you can identify the attached part so I can order an exact replacement if I need to.  Attached are three pictures which will show you a comparison of a Swisco Part 81-287 which I purchased from you recently and the actual part that I removed from the patio door.  As you can see it it smaller that the 81-287. The part I took off had a brass roller.  Your 81-287 has a plastic/nylon roller.  NOTE the original part was from a Canadian company, L O Ricci ((original).  I have also included a picture of that original.  It looks like the exact size as the 81-287.  Note: I did replace the other roller on the sliding door with the 81-287.  Before I replace the one I am in quiring about with the 81-287 I wanted to see if you carried the part I have sent you pictures of, and if it was original to the door.  It could have been a replacement of the L O Ricci and that was all the Door repairman had at the time (years ago).  Thank you for your help.  I hope I have provided you with enough information.  Thank you.   

Tahnk you Dave.  I found the other roller that I made reference to was made/distributed by Prime-Line.  It was a replacement used by a Sliding Door Repairman that I had used several years ago.  Since that time I educated mysekf on the Swisco 81-287 and how to replace it myself.  I will use the Swisco product.  It appears to be better constructed and fits wiht the roller used originally.  I will replace BOTH of the rollers to ensure it works properly.  Thank you and Deb for all your help.  Happy New Year!

UPDATE:  I installed both Swisco 81-287 rollers.  They work perfectly.  The Sliding door is working like new.  Thanks again.  Its nice to deal with a quality company that really helps the Homeowners.  With the costs of everything going up and up  I t felt good to save some money and not have to hire a "Repairman" again.  Have a great day!