glass tracks, what kind and where?

[damzookeeper]

Hi, I want to build some more cages but I'd like to use some glass tracks to be able to slide the glass back and forth. What do you all use for tracks and where do you get them. I only have a crappy tire and a home hardware in town. There soon will be a home depot near by but not for a wile as they are just starting the construction of the building. lol.

Once I find the tracks how do I silicone them in and then get the glass in afterwards?

Please, any ideas and help is much appriciated!! Thanks.