Auto body repair & detailing: rear end, rear control arm, auto recyclers

Question
I bought a 92 honda civic sedan lx that had been taken into the ditch.  It had ripped the passenger side rear control arm (I think that's what it is called) from the cross frame.  It has been re-welded back on.  I just had the car alinged and the person said it was not a good job and it should be done again.  First off who does this type of work?  Can you buy the support or does it have to be fabricated?  Thanks

Answer
 I believe that this part may be a dealer item,but yes it is available to purchase. You may
 want to inquire at a few auto recyclers or wrecking yards first though.
 The Honda parts can be expensive new, and more so at a dealer.Hope this helps,  Bill