Please review the below NSN(s) and provide us with any sources that are able to manufacture the item. Please also provide the location of the manufacturer (City and State OR country if applicable). Please also provide POCs for these manufacturers if available. All of this information can be submitted to Stephanie Frederick at Stephanie.Frederick@dla.mil Phone 614-692-5757. Thank you in advance for your assistance.
NSNs: 

5999012751231, 4940015251251, 5965016488042, 5965016640961, 4940016724105, 4940016784885, 5965016945628, 5965017104489, 4940017176094, 4940017177572

Should a company wish to be reviewed and qualified as an "Approved Source",they may submit an application package through the DLA Land and Maritime Alternate Offer / Source Approval Request (SAR) Program. A SAR package contains all technical data needed to demonstrate that the prospective contractor can competently manufacture the product to the same level of quality or better than the Original Equipment Manufacturer (OEM). The onus is on the contractor to document and demonstrate their product is equal to, or better, than the currently approved item which DLA Land and Maritime is procuring.
For further information, please reference the DLA Land and Maritime web page shown below and click on the highlight: Alternate Offer/Source Approval Program for a detailed explanation for the information and format necessary for a SAR and for the SAR approval process.
http://www.dla.mil/LandandMaritime/Business/Selling/Alternate-Offers/