We let this go for a shameful amount of time before I decided I could probably fix it. The roller broke so you could only pull it out about halfway or it would come off the track. I looked up the part, and bought it. Actually bought two in case it happened again. When I arrived I looked at how it was put together on the other side and then just basically pushed it onto the rod and it was fixed. I am ashamed it took so long to do it. Never be afraid to try it yourself. It was a total of $10 shipped to fix it.
disconnected inlet hose and water line from sink, removed old inlet valve and installed new valve and reconnected inlet hose and water line from sink - checked for leaks.