Try find the LONG stems from like the Tire man used to sell. I bought a set a couple of years ago but forgot where I put them so I ended up with using extenders. One after a while would not allow air into the tire (?) and the others were always low after a while. Found the stems while cleaning up some storage space and had them installed, put air in last May and when O checked again this week had only lost 1-3 psi since. A lot easier to air up, but are PIA for shops to use a spin balancer, They do require some rubber plugs to keep from vibrating but they came with the KIT. Check camp world they may have them. I remember seeing them at one time along with spare rubber wheel inserts. I run Alcoa rims. Also check amazon and ebay for the things.
https://www.amazon.com/DL1EC-Chrome-Dually-Valve-1992-2006/dp/B077MG3GZY/ref=sr_1_52?crid=2S0LAVVKFWRCG&keywords=extended+valve+stems+for+rv&qid=1636147631&sprefix=rv+extended+valves%2Caps%2C159&sr=8-52
http://tire-man.iwvisp.com/products.html