Giraffe crank help needed!

Hello all,
I have a Torker Unistar TX and want longer cranks for it. I believe the cranks that come with it are around 130mm, not sure how to measure them. The sprocket has 28 teeth. Looking on, they have a set of 140mm cranks with the 28 tooth sprocket.

What I need help with is this, I hate the short cranks and want some closer to the length of my Torker CX, which are much longer. I want the Giraffe to pedal like my Torker CX with the 24" wheel. Do you guys know of anyone who sells a longer crank than 140mm with a sprocket attached?