The Willow Triplizer

The Willow Triplizer is available at : Harris Cyclery in Boston

TA Triplizer (Slotted Arm Close-up)

The TA Triplizer is available at Harris Cyclery in Massachussetts and includes all mounting hardware
It's also avilable at Peter White Cycles in New Hampshire.

Jim Merz Triplizer

The Jim Merz Triplizer is out of production.

Stronglight Simple Triplizer

The Stronglight 135 bcd modern triplizer may require the inner spider of a Campagnolo Record / Chorus crankset to be ground away (I am not sure since I do not own one of these cranks.) This is not desirable.  (Photo Courtesty of Andrew Muri of www.YellowJersey.org).