Round shower door parts needed

I purchased a round shower kit from Home Depot back in 2010 and now all the parts are breaking off so I'm looking for pieces to fix it (rather than buying/installing a whole new one). There's a top roller assembly that totally looks like the it will work with the 10-058 that you've been recommending to others, but I'm just not sure about the bottom "guide" which is the picture. Is the idea that the parts you have with a bottom roller now replace the "guide" pictured?