I'm installing a new englander 25 pdv and bought the simpson duravent vent kit that is recommended by the manufacturer. I need a 45 degree elbow so that I can install the stove in a corner. None of my local dealers carry it nor do the online stores. Some of them show it as available, but when I call, they say that it is not in stock, and that they will not order just one. One dealer said that the reason it is no longer available is that simpson is replacing the entire series (pellet vent) with a new one (pellet pro), and they are not interchangeable. After my 5th email to simpson I still can not find the part. They keep sending me to more dealers, but no one has it. Does anyone have any suggestions? Where can I buy this part: pellet vent # 3045???