Digital DECpc Laptop - Looking for power cable and more

Last year, I bought an DECpc 425SE Laptop on eBay. It didn’t come with a power cable. I thought it would be simple to find, but no luck. Do you have any recommendations where I can find one? The seller noted that it only boots to Bios, so I need to find something I can boot it with. It looks fairly clean, so here’s hoping it runs well.