So where did you buy this pedal cover? I'm wondering if it's the wrong one? Dodge doesn't sell one or it would have come with the pedal package in the Scat Packs. I had to put mine one myself. Mine only came with the Gas and Brake pedal which I thought was stupid, the parking brake was still just that rubber pad.
The one you purchased looks like an exact match. What exactly is the issue getting it on? Did you do the factory ones yourself or did your dealer install them for you? Mine where in a box in the trunk.
Dodge does not sell a matching e-brake cover, period. If anyone does, I've never seen one. Pads like this one are widely available on the aftermarket, I bought mine on that big auction website.
If you compare the pics of the pedal and this pad, you'll see that they are not a perfect match. The pad is designed for use with a pedal that is welded or riveted to the e-brake pedal assembly, whereas LX/LD e-brake pedals are stamped.
To use this pad, parts of the rubber "flap" need to be cut away for clearance. The result is a very loose, sloppy fit that will cause the pad to fall off, usually the first time the pedal is used.
Most Charger owners who use this type of e-brake pad use glue to hold them on, with varying degrees of success. The only foolproof way to hold them in place is to drill through the pad and pedal and use a screw as an anchor.