Rear Drawer Guide

We are trying to find a replacement part for a drawer slide. You do have an item that looks almost exactly like it, yours' is white; ours is brown:

Rear Drawer Guide
Product Code: 32-031

However,it is off all around by about 1/8". For example, where your product is 3/4" wide, ours' is 1/8" smaller. The opening that is 1 5/32"; ours' is 1".
Is there another one that would work for us?