Nordstrom has an example of a good pair of leather pants, and H&M is also getting these sort of more loose fit version, like Connected to Fashion. And here another leather track pants of Asos. Or the skinny (fake) leather trouser of H&M or Balmain. The aubergine leather trousers are also nice from Maison Martin Margiela. I got mine from a second hand shop for only 15 euro, real leather, an high-waisted trouser with tapered leg, more like this one from Malene Birger.
Asos
Connected to fashion has one of H&M
Balmain
Maison Martin Margiela
Marlene Birger