See attached Combined Synopsis/Solicitation & Notice of Intent to Sole Source: Purchase of a Factory-Certified Refurbished HUMIMIC Starter Kit Control Unit directly from the manufacturer: TissUse GmbH... See attached Combined Synopsis/Solicitation & Notice of Intent to Sole Source: Purchase of a Factory-Certified Refurbished HUMIMIC Starter Kit Control Unit directly from the manufacturer: TissUse GmbH, Oudenarder Str. 16, Berlin, 13347 Germany as no other commercial source possesses the proprietary software source codes, diagnostic calibration fixtures, or engineering data necessary to execute the required factory recertification and maintenance for this specific hardware.