I suggest
https://duckdice.io/ I'm not sure with
https://bustadice.com/ but they are a good provably fair game provider. May I ask why don't you just stick with the Wolf.bet? do you have any problems using it or anything that stops you from playing on that site?
Didn't duckdice had some issues before? I haven't seen any issue with bustadice before so I am more inclined to trust them more than the other that has an issue. Even if they've solved it, the trust won't be the same.