This is all I use for putting modern stems on older threaded fork bikes. Simple, high quality, doesn't make me change out a vintage headset for something that isn't native to the group I'm using and is height adjustable in 10 seconds with a 6mm Allen. I wish him well, but it isn't for me.
Nitto MTC-04 Quill Stem to Threadless Adapter - 28.6/22.2mm | - Ben's Cycle (benscycle.com)