Thanks for choosing SWISCO. com. To help us help you, can you please send us some photos of the roller along with the dimensions. Please show us the wheel and let us know the diameter.
We're definitely getting closer. I believe the housing in your picture is only the inside portion. There should be an outer housing that goes around this, probably still installed in the door. If we can see the whole roller unit with the outer housing in one shot, we can recommend something that could work.
I'm afraid that's still just showing the inside portion of the housing. I highly recommend checking the door to see if the outer housing is still installed, I'm almost certain it is.