the swingers are ebay are GREAT for the pice. its not like its a ASR or Lonestar swinger but they are worth the $200.00 shipped to your door.
um a-arms are a different story most are about $500.00-up. you could always just but a diamond j wideing kit. i have one and its great. alot of others on this forum have it as well.
burgard makes some pretty good a-arms and you can usually find a set on ebay for about $300 brand new. You'll have to have your spindles reamed but its not that big of a deal.