Seeking drawer track guide for Basset drawer chest (pre-2007)

I looking to replace two (or more?) drawer track guides from a Basset chest of drawers. The curved ears on the bottom of two guides failed, causing teh drawer to fall out of it cavity upon opening.
The track uses a wooden rail. The guide slides along it using teh clot above the ears.
Do you ahve somehting like this available for sale?

Thanks!
 I'll compare the measurements tomorrow.