I just made a few enquiries and found a company in Toronto that sells clear acrylic tubing, 1/2" o.d. x 3/8" i.d. for $10 plus tax for a 6 foot length. I want to make up some fancy oilers for the Kerzel---Will clear acrylic stand up to lubricating oil okay or will it craze or turn yelow? I do not get along well with glass tubing---I break it, it cuts me.---Brian