Replacement wheels for SGD-R15 sliding glass door

I have a 20 year old sliding glass door. The label says SGD-R15. I need to replace the wheels. There are 2 wheels per unit. The only replacement wheels I have found have dimples on the outside which I believe will make it difficult, if not impossible, to fit them in the frame. It enlarges the width from 5/8 (or 11/16) to 7/8".Can you tell me where I can get replacement wheels or do you have any suggestions or recommendations.

I made a mistake on the wheel diameter. I need 1 1/4" wheel diameter. What model would this be? Thanks.

After I asked the last question, I saw 81-173, which are stainless steel. I then saw and purchased 81-056, which is the same unit, but not SS, and less expensive. I hope the 81-056 provides the same or similar service as stainless steel. Thank you.