I got mine from these folks: https://www.shinyrv.com/product/dually-valve-stems-for-motorhomes-with-alcoa-wheels-2-hand-hole-dl4ac/ You might want to check with them. I got dually valves for my Alcoas there.
Hit "Contact" on the site above and their phone number will be on the left side of the page. Easy to talk to and they will know what you need. I called them before I ordered my "Dually" stems to make sure I was ordering the right stuff ............. and everything fit right up.
Safe travels
Ed Sievers, Denver, CO
07 WGO Outlook 31-C; '16 Kia Soul with 6spd DIY Tranny
"Be the person you needed when you were younger"