Yeah, I figured that he was the generic Genesis model, I thought it was 3 (does look like 3 as well) but with a different skin (eyebrow color is too light on Gen3). The hair has eluded me. I thought it was Tousled Hair, and that looks similar, but it isn't that. I searched these forums for "Derek", read most posts (took over an hour), and seen good renders, but nobody sharing the info. I searched for the hair on Daz3D as well as here but no luck on that.
I don't understand why people just don't share what they find in here? When I discover assets I always share what I find, often with example renders, it's not difficult. This is a fan art forum, so it is okay to share the assets.
Anyhow, I'm off to find that hair (again), now that i know he is definitely a Genesis 8 male (booted up Daz Studio to be certain), that actually really helps me in pointing in the right direction anyhow.
If and when I find the correct assets, I will be certain to post what they are here (with links etc)...