Suspension parts?

Hey guy so this may be a bit of an over asked question but I just can't seem to find the answer. I have a 1978 Plymouth volare with the torsion bar front suspension. Where in the world can I find new/interchangeable control arms? All I've been able to find is bushing to "rebuild" my control arm and for the life of me I can not get the pivot bar bolts loose. Any help would be appreciated.
Author: Gorm2297