Hardware part needed

A quick learner from Virginia Beach says:
I'm looking for a couple of these for the door on my boat. The door works similar to a closet door. The printing on it appears to be Delmar Hardware Toronto. There is no part number.

It's 11/16" wide,1@3/16" high (the dimension going into the door), the part that is inserted is 4&5/8"long, and the overall length is 6&1/8. The screw holes are 5&11/16" center to center
User submitted photos of patio door hardware.
Profile picture of Paul
Paul from SWISCO responded:
This looks a lot like our 81-018 tandem roller assembly. Based on the corrosion I see, you might want to consider stainless steel version, our 81-149.
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