Top roller on mirrored closet door
Hello there. See our 23-093 Spring Loaded Upper Roller Guide. Compare with your old part and see if you think this could work for you.
Rob
Oh, I see what you mean. I'm sorry for missing that detail; if your roller has a screw adjuster, then our 23-027 would be the better option.
As for removing it, there is no way to do so without taking the door off first. You will need to adjust your rollers enough to give your door clearance and then lift it out. I'm afraid it's not possible to remove the rollers without doing this first. It would be extremely difficult and if you were successful then the door would just fall on you, since it has nothing to support it.