Realistic Black-and-White Portrait Sketch

I need a highly skilled sketch artist to create a detailed black-and-white portrait for a memorial. The sketch will be based on two low-resolution photographs and is intended for laser engraving on granite.

Requirements:
- Precision and clarity are crucial.
- Lifelike representation is essential.
- Plain background with no text or inscriptions.

Ideal Skills and Experience:
- Expertise in realistic portrait sketching.
- Experience with black-and-white mediums.
- Ability to work from low-resolution images.
- Attention to detail and high level of craftsmanship.