Thought I'd post this here, and on the Berserker 24mm thread, since some replacement parts for Berserkers are very hard to find.
MyVPro.com carries some normally hard to find parts for a large variety of tanks, especially Vandy Vape and Geek Vape (ie. replacement glass, insulators, parts bags, drip tips, etc.). They're the only place that carries the Accessory Bags of the spare parts (which contain o-rings, screws, etc.) and they also have the 2 types of drip tips...for the Berserkers, and many other Vandy Vape tank parts.
Usually, because their S/H is high (to me), even for little littleweight stuff, I've held off on ordering some things because of that. However...they're having a FREE S/H promotion this week-end ...so it makes ordering those things a much better deal, IMO!
They also have lots of tanks, parts, etc. in their Clearance section, too. They're really marked down in many cases, so you may want to peek at that section, too.