Help identifying patio glass door double wheel rollers

Greetings,

I've got a metal sliding glass patio door that needs replacement rollers. I do not know the brand of the door, but the rollers are stamped with "DELMAR HARDWARE TORONTO". I've uploaded some photos that I hope will help, but there is some parallax that may make it harder to get the exact measurements. Hopefully you'll be able to provide Swisco replacement parts.

Thanks,

Peter