Our shop also has an (Nearly obsolete, and battery is on its way out) OmniScanner, use it on rare occassion for troubleshooting and if a customer gets ichy about something, but most all jobs requiring Certification, are 3rd party anyway. Here's the funny part... half the check list is visual inspection, and documentation anyway.
And most of the time, its the customers IT dept that will do it themselves.
Exceeding link length is paramount to instant fail, So a wire mapper with TDR is an inexpensive alternative for a quick check before a third party certification. (Just to save embarasment if someone rolled a pair, or left 300' of cable in the cieling.) Fluke makes a good one for about $500. http://www.flukenetworks.com/us/Cabling/Residential+and+Basic+Testing/MicroScanner+Pro/Overview.htm
Some certification tools will run about $2000 -$16000. Not a purchase to be taken lightly. There are also places that rent them, and sell used. Heard of an on-line renter that will Fed Ex one to you for a day. (Forget the name.)