Isn’t part of the point of a 609 build to set your lengths where you want them? I haven’t looked, are you saying they sell an empty housing with the sides already cut to length and C’s on?One additional thought... the TG front 609 has a pumpkin very close to the center of the truck. I'm sure that's partially for leaf spring packaging options.
But... It forces more lift as it gets very close to the oil pan on the 3rz at bump... If it was moved about 4" closer to the driver's side, it'd be a much better fit in the tacoma.