I'm interested in the job! Please take a look at my work and see if it is what you are looking for. If so message me, if not, keep me in mind for any future commissions needed. I'm also relatively cheap with pricing, just message me and tell me what you want to pay and we can figure it out from there.
I'm not sure if you'd be interested in traditional sketching, but if you might be, I have some good news for you: I'm working on a project where I transform people into monsters. I don't have many samples of the project on here, but I do have some samples of human drawings and the macabre: I am open to negotiation about prices, though usually I operate on a base fee (in this case, about $8) then $7.50 an hour for work after that. Since you're going for a sketchy style, it probably would only be a few hour's work. As a warning, I'm a busy person, and though the would would probably go quickly, I would give it some time to finish, especially if you need time to decide on an artist past Thanksgiving week. I'll give you an estimate of time it'll take, but I'm finishing up my semester and holding down a retail job. Just a warning. I lost a commission recently due to this scheduling.
I can easily do something like this for you. I dont have any zombie images to show you, but mostly all it takes is some knowledge of the musculature underneath the skin (which I have) so I can make your faces all torn up. Ill also change your guy's uniforms to have rips in them and whatnot... itll look badass. Ill switch up from my comic book style to match the realism of your photograph as well, it wont look anything like my other stuff.