1972 a body 340 motor mount bracket

Here is a little more info. I have a 73 swing with a slant six. I wasn't able to find a crossmember for a 73 v8 on an a body, but I was able to find a 72 340 a body crossmember. Now that I have the crossmember I am not being able to track down the motor mout brackets, like I said before I can get the motor mounts themselves anywhere but I need a little help tracking down someone or a company that will sell the 72 340 mounting brackets.