I recently made a hat for Matt. I used some super-soft alpaca yarn that I picked up from an industrial-revolution era wool spinner located in Alberta. I managed to find a colour which was close to the alpaca logo he uses on his site to keep it on-brand.
The pattern I ended up using was a free japanese pattern. I wasn't quite sure how to read the ribbing section, so I used a slip-stick to give it a slightly elongated stitch to match the faux cabling.