NOAA intends to award a sole-source purchase order to ETI Acquisitions LLC in Fort Collins, CO, for specific Windscreen Complete Assemblies to be delivered to Grandview, MO. The justification is that the parts must be identical to the original proprietary equipment, and only this manufacturer can provide them to avoid costly and time-consuming retesting. Firms believing they can meet the requirements may submit substantiating documentation in writing within 15 days of the notice's publication for the government's evaluation. Oral communications are not acceptable.