It seems like you're looking for a specific type of men's biker pant made from black cowhide leather with a front-to-back zipper design. While I can't provide you with specific product recommendations, I can give you some general information.

When searching for handmade men's biker pants, it's important to consider the quality of the leather, craftsmanship, and fit. Cowhide leather is a popular choice for biker pants due to its durability and toughness. Genuine leather pants are usually more expensive but offer better quality and longevity compared to synthetic alternatives.

The front-to-back zipper design you mentioned is often associated with biker or fetish-inspired clothing. It typically features a zipper that runs from the front waistband all the way to the back, creating a distinctive style. Keep in mind that this type of design is often considered niche or specific to certain subcultures.

To find the specific style you're looking for, you may want to explore specialty retailers or online stores that cater to biker or fetish fashion. These retailers often carry a wide range of biker pants, including those made from high-quality leather. Make sure to read product descriptions and reviews to ensure the quality and fit meet your expectations.