Cover piece for 84-026?

Hi,
I am looking for a replacement for this corner roller of a screen door. I believe the measurements correspond to your part 84-026 "1-1/8" x 13/32" Corner Screen Roller Assembly, 15/16" Wheel." However, ours has a cover piece attached to it that is not removable. Your picture either doesn't have this cover, or it's been removed to show the inside components.

Is there another cover piece I should order? Is there any reason to think this part wouldn't work anyway, even if there is no second piece?

Thank you,
Sharon

Hi,
I thought I had attached a second picture showing the other side, too. Apparently only one went through. I will try again here, and you can see what I mean that our part is completely enclosed with two plates, not one.
Thanks,
Sharon