www.50resto.com sells them or a junkyard or www.Jegs.com you can do what I did for my victor Jr. intake I couldnt fit the stock 5.0L one on my 351w so i went to the plumbing store and got (2) 3/4" short fittings and a 3/4" elbow and made my own look for a 3/4" heater hose elbow
Do you have a picture of this? That's the problem I am having. I have a 351W intake and an elbow won't clear the intake. I might just get a straight fitting.