You could try skoal, if your desire is to ruin your teeth and gums (dentists LOATHE dipping tobacco) and I do believe the cancer rate is lower overall compared to tobacco as you are not igniting it. However, it's also a HUGE bolus of tobacco-chemical goodness, and probably isn't the greatest choice.
I would suggest Swedish snus over skoal myself, it's been proven to be as good a method of harm reduction compared to tobacco. I also know some folks in the smokeless tobacco forum are getting good results from Nic salt pouches, or even using them and adding a bit of "WTA" liquid (whole tobacco alkaloid eliquid) to achieve good results.
Perhaps you will find some of these options more satisfying than vaping OR smoking, although they can tend to be more expensive.
You cam try skoal if you wish. There are some significant downsides, and yes, it is possible to get jaw or mouth cancer (equally true of smoking really) although if I am understanding things correctly, dippers get less cancer overall than smokers, it might be a somewhat safer choice.
I have met many "long term" dippers and they have a very hard time (quite often) giving up the practice, later on down the line, so please be cautious. Skoal is not without risk, and often dippers transitioning to vaping have quite a hard time, due to the amounts they wind up consuming.
But, why not give it a try?
Also, do you ever like, give yourself time frames? For example, I will try vaping to reduce my dual use for two months, and see what happens? It's going to be hard to land
anywhere unless you give something, ANYTHING a reasonable chance of working.
Also, you are a smoker. I was a smoker, and a 3 ppd one. I did not expect to transition to vaping without a certain measure of suffering (USING WTA, nic salts, etc.) and I did suffer. You are not going to know if vaping or
anything is going to work for you without a certain measure of suffering for probably at LEAST a month, if not more. I spent my "suffering" time learning all about vaping, so I could best enjoy vaping once detox ended and my craving subsided.
I don't know that "vaping isn't working for you" I'm not sure you've given it enough time.
Best of luck as usual. Let us know how it goes.
Anna