NOAA intends to award a sole source purchase order to AAK Power Supply Corp for specific Power Supply Units needed for the ASOS system. The units must be delivered to the National Logistics Support Center in Grandview, MO. This sole source action is necessary because AAK is the only manufacturer, and using an alternate power supply would require costly engineering evaluation and system modifications. The procurement is not competitive, but interested firms may submit substantiating documentation within 15 days of this notice to be considered for a competitive process. No budget amount or submission deadline is specified.