I got this Savinelli 320 EX today from an ebay, make an offer, auction. I use to think this style of pipe wasn't very attractive until I smoked the first one I got from an earlier ebay win a few weeks ago. I was really surprised at how well it smoked, so I went on a Sav 320 spree. I've even got two estates coming from Italy. Anyway this EX is pretty cool but I need to find a new stem for it. What's my best option?