..if someone has a '07 KB crossover and wishes to trade for the '05/06 style, that is another option. (he has a '05/06 crossover, but that is not compatible with the rest of the T-hose and radiator hose on the car now.)
I have the 07+ crossover on my car. My friend wanted me to make one for his 06. Its made from 2 pieces of machined billet with a steel crossover tube in between. It would take me a solid day to machine plus the cost of materials. Probably why KB charges $350.
It's honestly not something worth my time given you can buy it direct for KB for $350. And that price includes the crossover tube, both couplings, clamps,etc.