I've been fortunate enough to get my hands on some rods of the splendid Tibaldi Impero Celluloid. It took 5 months and filing a PayPal claim before I was actually able to receive the material I'd paid for. When it finally arrived, I couldn't resist taking time the very next day to make a pen for myself. I chose a Medium Idyll, clipless, with a black Japanese ebonite section so I wouldn't risk staining this lovely celluloid. I filled it up with Sailor Yama-Dori, and it has quickly become my personal favorite pen. (Edited to correct spelling.)