The Kreller Group specializes in providing due diligence and background investigations for companies, according to a profile in Met. Corp. Counsel, Vol. 16, May 2008 at 38. They serve as private-eyes for companies and are likely to be retained by law department attorneys. I mention them because they are a genus of service provider that I haven’t written about (See my posts of July 21, 2006: cottage industries and 10 references cited.).
While on the topic of unusual vendors, I should mention the specialist companies that help luxury-goods manufacturers locate, authenticate, and dispose of counterfeit goods.