title_body: Commercial beers made using a (triple) decoction mash?
upvoted_answer: Source Material Referenced below. Depending on where you are located some of these I think would be available. In Milwaukee I've seen Pilsner Urquell, De Konick, Palm, and Rodenbach.
  
  According to Gordon Strong, Pilsner Urquell uses triple decoction. This is actually a Czech style.
  
  Another article from real beer states the following beers.
  
  
  De Koninck 
  Palm 
  Rodenbach
  Pilsner Urquell
  
  
  Czech Pale Lager: Style Profile 
  
  Decoction mashing