Triumph Bonneville part identification help!?

I own a 2002 bonneville. The part you are wondering about is the voltage regulator/rectifier unit. It is mounted there because part of the charging system (zener diode) on the original Bonnevilles was mounted there and they wanted these bikes to look retro. However, unlike the original piece, this unit is of modern design and is essentially the same as 99% of all the other motorcycles out there.