Dual Molex 4pin-8 pin PCI-E adapter (HG2)

Hi. Does anyone have 2 spares of these below, please? As my old tower PC'sPSU ( power supply unit) was damaged yesterday and was thinking to see if a very old ATX can power it up using these connectors ''Dual Molex LP4 4 Pin to 8 Pin PCI-E Express Converter Adapter Power Cable Wire'', Regards