Get a hold of Bruce at Aggressive Performance, Im not sure of the price though but i do remeber seeing them on his web site. He's a Vendor here so goto the home page and click on Aggressive Performance. I get all my parts from him and he knows his stuff as well as providing cust. service 2nd to none
Check out ebay.. May save you a bunch of money. Got mine for $30+ shipping. Do a search for WS6 or Trans AM in the suspension parts and make sure it is from a 87-92 TA or Camaro and is the 36mm hollow one.