Used limbs, Ebay or Archerytalk. New limbs, through your closest mathews dealer. If you buy new limbs through a mathews dealer, they will have a lifetime warrentee to you. I bought a couple sets used, and a couple sets new for a few of my mathews. If you really like that XT, don't be afraid to go new. You won't need to replace the bow or limbs for a long time.