NOAA intends to award a sole-source purchase order to GMS International Corporation in Reston, VA, for two specialized Rosemount 858AJ115 heated air data probes for a G550 research aircraft. The sole-source justification is that the company is the exclusive worldwide distributor for these mission-critical probes, which are uniquely engineered to interface with the aircraft's existing nose boom and electrical systems. Delivery is required within 80 weeks from the date of award. This pre-solicitation notice is not a request for proposals, but firms believing they can meet all requirements may submit substantiating documentation to the point of contact within 15 days of the notice's publication.