PPC was the first place to have the bracket, and so far the only place ive found that carries the sli tubes. Both of my orders have come in super fast. Like within 4 days of my order, using usps.
Fair warning, you will have to sand down the waterblock for it to fit. The delrin extension hsa to be sanded down flat with the waterblock for it to fit due to the design of the xspc waterblock.