All homemade. Standard socket and 2 pieces of solid THHN. Strip connector to hook up everything.
If this is going to be a little more permanent lamp cord. Have made up dozens of these, they're commonly used when fixtures are taken off for painting or other ceiling/wall repairs. Currently I have 8 of them hanging in an appartment undergoing a total renovation (where the pics of the switch and the 3way tap came from, all removed by now and replaced with Schuko receptacles, fed by THHN in PVC flex conduit, all protected by 13A breakers)
