Kansas City Southern has acquired four more locomotives and eight passenger rail cars that will bolster its historically accurate passenger fleet for office car specials.

KCS bought the locomotives and rail cars for an undisclosed amount from the St. Louis Car Co., KCS spokeswoman Doniele Kane said Monday. "Minor modifications will be made to this equipment, which will augment the existing Southern Belle business train fleet," Kane said.

Part of the new equipment will be based in Monterrey, Mexico, Kane said.

The St. Louis Car Co. has been doing business as RailCruise America, a collection of touring trains that run out of Union Station in St. Louis, said principal Ed Boyce. Boyce is an entrepreneur best known as the creator and chairman of Innsbrook, a weekend vacation getaway 45 minutes west of St. Louis that has burgeoned into a resort, a conference center and now a thriving residential community that spreads across 7,000 acres.

The locomotives and rail cars originally were Union Pacific equipment that dates to the 1850s and includes wood-panel interiors, Boyce said