I have a 3" and a 2.25", your welcome to use and if you can't find what you want or want to watch a video on drill tanks you might want to go to Glassholes.com, very fast service and great video.
+1 to the glass holes reference, I ordered some bulkheads and loc line on Monday and it arrived wednesday with only $3 in shipping. And the guys that run the place have a funny sense of humor too lol ( their return address was Mike @ the Mother Ship )