This is a more costly alternative stem plus adapter set up that has been my go to for my conversions of late. At current prices about $30 for stem and $15 for adapter which is a tall adapter which helps me get bars up high enough for my old back.
It's been working well for me along with a Sunlite North Road alloy upright handlebar with lots of rise.
3 1/2" of rise if I recall correctly.
Down side was around 2 week wait for shipping of adapter from Taiwan.
I ordered a couple so I'm ready for next project.
https://m.ebay.com/itm/SpeedPark-260mm-Stem-Insert-Conversion-Adaptor-for-22-2mm-Fork-to-28-6mm-Silver/112281777424?hash=item1a2483f510:g:iVcAAOSwnHZYiE0b
https://m.ebay.com/itm/Origin-8-Pro-Fit-Alloy-Ergo-Stem-Stem-Or8-Mt-rd-Aly-90x25-4-17d-Sl/362079107994?epid=1000130074&hash=item544d98bb9a:g:d-sAAOSwcj1aHCkr