Nifty New (to Me) Dresser -- Dumpster Diving Treasure

While strolling down our alley last week, I spotted this dresser waiting to be picked up by the garbage collectors. I ended up making half a dozen trips up and down the alley to carry all the pieces back. I found it at the same bungalow where, earlier this spring, we found the swinging kitchen door. That treasure is still in our garage, waiting for a new purpose. (If you're in the Chicago area and need a door for your bungalow restoration, let me know by posting in the comments. You may have to patch a bit of the corner with Bondo or something, but it's an overall good door that we don't think we need, and are willing to give away.)

Anyway, the exterior of the dresser is in excellent condition. There are a few scuffs, but nothing serious, and most can be buffed out. I'll replace the round wooden knobs that scream "hello, I'm from the eighties" with something modern and bronze. Half of the knobs are missing, anyway. But I'm not sure how to go about fixing the sliders. It's probably the reason the neighbors were tossing this dresser out.

Each drawer has a simple groove that fits onto the slider:

Here is what the sliders look like:

Each slider is about 13 inches long, and is just a simple plastic piece that screws in place. Half of them on the dresser are either broken or missing. I checked Menards, Home Depot, and Lowes without luck. It's kind of an old style piece. I Googled around, looking for replacements, but I'm not sure I'm even calling it by its proper name, because I can't find anything like it.

So, my question to y'all is this: do you a) know if this is actually called a slider or not and b) where can I find a replacement? Short of that, what else might I try as a replacement, without making this project into too much of a production.

You see, until I actually fix and use this dresser, both Ted and Mom will continue to mock me, as they often do, for my dumpster diving and alley prowling, because I tend to bring home things that are of genuine value, but don't take (or find) the time to fix them, so they collect in the garage. I just can't stand seeing perfectly good items getting tossed out.