More information regarding the design of the new Cylon Raider shows that the Cylons appear to be a form of biological machines. No information is given on how they feed or if they even need nutrition, or how they go to the toilet. But we do know they are susceptible to virus attacks like their human counterpart.
Starbuck piloted a downed Raider when she crash landed on a deserted planet. She literally had to figure out which organs controlled the ship's functions, and found the Raider to be a versatile fighter craft, despite the smell. Apollo himself wasn't able to shoot it down when Starbuck was piloting her.
Actual Studio Prop Model
I only know of JT - Graphics 1/24 scale Howling Wolf kit. A fine representation of the Season 1-3 Raider used by the Cylons. The ship is 1/24th scale and measures an impressive 16.5 inches in length when assembled! The kit comes with a detailed set of instructions, a Cylon symbol base, and a set of pristine and distressed decals from JT-Graphics
YT's build using Howling Wolf's Raider