Probably the most famous brand of this liqueur is Ancho Rayes, which you should definitely seek out. Some comments on Ancho Rayes:
This liqueur makes our favorites list not just because of its delicious taste, but also because of the complexity and depth of flavor it easily adds to so many cocktails. This shit plays great with others too. Whether it be tequila, mezcal, dark rum, and even whiskey and gin, you can add a little or a lot for entirely different results.