For those forum members that bought the SRT Steering Wheels from that ebay seller this past Jan., 2012.
After a hard-to-find search of these omitted parts...
Here are the correct part numbers for those 2 missing paddle & switch covers on the rear-side of the steering wheel.
Right Cover- Part #1YT66DX9AA
Left Cover- Part #1YT67DX9AA
They both are surprisingly less than $2. each and "Made in USA".