This is a sources sought notice for market research, not a solicitation, to identify commercially available crane parts and components. The parts are intended to repair or upgrade two Heyl-Patterson 10,000 lb capacity cranes at Naval Submarine Base Kings Bay within the NAVFAC Southeast Area of Responsibility. The required parts include specific Magnetek VFD control panels, a Magnetek pendant, and a Rueland inverter-rated motor with gear reducer, all compliant with the NAVFAC P-307 Weight Handling Program. The government seeks responses to determine whether compatible non-brand-name parts exist; if not, it intends to solicit using brand-name parts on a single-source basis. Interested parties should provide their experience with alternative parts or justification for staying with brand-name parts, as this will inform the government's procurement approach.