Frame Problems

[88StangGTConv]

I had an accident in my 67 mustang gt and my "subframe" is bent. It is a part of the fram is welded on to hold on the bumper, sort of on the left or right side. Like if you were to have a head on collision with something it would seem to bend it and then you would have a bent frame. Anyway my question is this, can i just cut this off and weld on a new one? and where would i find a new one to begin with becuase i can't seem to find them in a parts book.... I was also thinking that i should just get another mustang and use the parts off of it to just replace all the damaged ones to my old stang...