1974 duster spindle help

I have a 1974 duster 360. I have been rebuilding the front end and got to the driver side spindle. It appears a bearing froze up at some time and ate up the spindle pretty bad. I am unsure how long ago. The bearing in it now was good. I am having a very hard time locating a new or used spindle for it. Do they make aftermarket for the 74 a bodies or will a B or E body spindle work with control arms? Does anyone have an a body driver side spindle for sale? Thank you