Book cover for Fantasy/Comedy novel

I need a cover portrait of the main characters, on minimal or no background - an elf and dwarf, both detectives, and the dwarf's pet magical pig. I picture them in medieval costumes, but possibly with touches that evoke 40's private eyes. The dwarf is on the left. He is blond, bushy bearded, and solid/chunky. He has a two-headed hand axe in his belt with intricate scroll work on the heads. The pig is in the center, either with sparkles to suggest magic, or fading away at the rear to illustrate that it can turn invisible. The elf is on the right. Dark hair, resembles Humphrey Bogart, a head taller than the dwarf. He is wearing a no-nonsense plain sword on his left side. His hat is a cross between the stereotypical elf hat and a deerstalker cap, with feather. He is holding a magnifying glass.
Stylistically, I am looking for something somewhat cartoonish, but not overly so. Start at Phil Foglio, but a little more detailed and realistic. Chapter 1 attached, for flavor.