I bought my house 3 years ago. I need to replace the shower door guides that keep the shower doors from swaying. They are plastic and aprox 3inches by 3inches in the shape of an "L". The roller guides are on the top of the door and the bottom guides I need are just there to keep the doors from moving around. Can anyone help even though I do not know the manufacturer?

Shower glides

shower guide, another view

was shower door, now Peachtree window parts...