PGT impact glass slider; replacement rollers

Looks like a 2003 year door judging by the 2003 stamp. This part is not original, it is a replacement part. We used brass replacements in a pinch. Looking for stainless steel replacement rollers. The door has very heavy use, and brass will only last me a year.

Thanks so much. Your company has 5 out of 5 stars as far as I'm concerned.