Author needs a book cover design for a science fiction novel

This is what a business in Australia was looking for in their book cover design

My name is John McKenna. I need a book cover design for my science fiction novel - "Good Luck Earth"
In the 36th century a giant comet is hurtling through space on a collision course with Earth. On its way past Pluto the people of Pluto decide to offer a message of encouragement. They place a huge sign on the comet - GOOD LUCK EARTH in huge red neon letters. (The words GOOD LUCK are on top of the word EARTH). So the first thing I need on my cover is the comet with the Good Luck Earth sign.
A woman from a time well beyond the 36th century then makes an appearance. She has put the comet on a collision course with Earth in order to protect her own timeline. Her character is an ode to the Sirens of Greek mythology who use their great beauty to lure sailors to their death. She has red hair with a hint of metallic blue, hypnotic blue eyes with a swirl of green, effervescent red lips, a tattoo on her left cheekbone of six blue doves flying in a circle, a short golden dress that show… Read more