A quick GOOG shows a couple:
BMW Repair by Protech Motorsports in Greenville, SC | Bimmershops.com
Bimmer Specialist Incorporated, Greenville, SC : Reviews and maps - Yahoo! Local
Have no exp w/either one...I used German MotorWerks in Asheville, NC but that
is not handy for you, I understand.
A couple of posters here are in G'Ville area and they may chime in for better
rec'ds.
I would guess you had the displeasure of being a customer of Century BMW;
I agree that they absolutely suck.
GL, mD