You can download source art for KF2 characters that will server as reference when modeling cosmetic items.

Reverend Alberts

http://art.tripwirecdn.com/kf2/sourceart/character_packages/CHR_Alberts.zip

Ana Larive

http://art.tripwirecdn.com/kf2/sourceart/character_packages/CHR_Ana.zip

Police Constable Rob Briar

http://art.tripwirecdn.com/kf2/sourceart/character_packages/CHR_Briar.zip

Classic Briar

http://art.tripwirecdn.com/kf2/sourceart/character_packages/CHR_ClassicBriar.zip

Classic Masterson

http://art.tripwirecdn.com/kf2/sourceart/character_packages/CHR_ClassicMasterson.zip

DJ Scully

http://art.tripwirecdn.com/kf2/sourceart/character_packages/CHR_DJSkully.zip

Donovan Neal

http://art.tripwirecdn.com/kf2/sourceart/character_packages/CHR_Donovan.zip

Lt. Bill Masterson

http://art.tripwirecdn.com/kf2/sourceart/character_packages/CHR_Masterson.zip

Mr Foster

http://art.tripwirecdn.com/kf2/sourceart/character_packages/CHR_MrFoster.zip

Hayato Tanaka

http://art.tripwirecdn.com/kf2/sourceart/character_packages/CHR_Tanaka.zip

Anton Strasser

http://art.tripwirecdn.com/kf2/sourceart/character_packages/CHR_Strasser.zip

Tom Banner

http://art.tripwirecdn.com/kf2/sourceart/character_packages/CHR_Chivarly_Knight.zip

Rae Higgins

http://art.tripwirecdn.com/kf2/sourceart/character_packages/CHR_Rae.zip