Okay, in case anyone wants another way to do this...
Basically I followed the way this Mazda owner did it (with photos) on this link -
And, by the way, the actual window regulator has nothing to do with the issue. It's the rollers that are attached to the two brackets on the window that are the problem. In my case they were basically falling apart.
Here are specific measurements you'll be dealing with:
The new rollers/(nylon furniture glides) - 1-1/8" diameter (about 5/16" wide)
The rivets on the window brackets where the rollers will be installed - head diameter is 1/2" (about 1/32" depth), and the rivet axle is 5/16" wide, with the height of the rivet 1/2".
Essentially this is what I did: I bought the 1-1/8" nylon furniture glides that come with a nail that you'll need to punch out. Best way to do this is to find the center of the glide and drill a 1/16" hole (you don't want this any bigger if you want to countersink with a forstner bit because the starter hole for the forstner bit needs to be fairly small or it won't be centered) to the head of the nail. Turn the glide over and knock the nail out. Then I used a 7/16" forstner bit to drill a countersink/flat hole (about 1/32" deep) for the rivet head to sit flush (7/16" is going to be the diameter of the rivet head after you grind/file it down - because it'll need to be filed down to make it easier to get the glide/roller on; as is illustrated in the link above).
I used a small grinder wheel attachment that fits a standard 3/8" drill to grind the rivet head to size. Try to focus not only on diameter but also the top edge (round it off to make pressing the roller on easier).
In the link above he drills a 3/8" hole for each roller. I went with 11/32", but with nylon it's probably not that big of a deal. 3/8" would make it a lot easier to press the roller over the 7/16" diameter rivet head, but make sure you don't go any larger than that (so the roller will stay on when you're done).
He used brass washers for the spacers under the roller; I decided to go with nylon washers at 3/8" hole/5/8" diameter (the width - a LOT easier to install the thinner they are - I used a couple of 1/32" thickness washers and one 1/16" washer = the 1/8" spacer needed below the roller).
As he states in the link, he used channel lock pliers to press the rollers on, and this is definitely the best method. I smeared some grease on to kind of help it along.