Well, I finally got my parking brake pedal from Ultimate Pedals. It took 2 weeks after it was ordered. Since their web site doesn't list a brake cover for the Challenger, I specified a "shiny smooth" parking brake cover, with flat rubber grips, for a 2009 Dodge Charger. To install it, they recommended drilling two holes in the parking brake plate. I didn't like that idea because I didn't want to drill anything and would only have been able to use the middle rubber grip in the empty slot.

My solution was Velcro- others have used 3M double-sided tape. It seems to be working fine. If I decide on a more permanent solution, I will use JB Weld cement.

Here some photos of the cover before and after installation. Although it is slightly shiner than the MOPAR pedals, I am pleased with the match. It was worth $37.95 ($25+12.95 shipping)to "finish-off" the interior.