okay mate, (firstly gday from melb), secondly there is a diff between a bong and a hookah, the ones with many hoses are not real hookas, though for some reason here in aus they are called hookas, a hookah is a traditional middle eastern water pipe (also known as a Nargillah, Nargila, various other spellings..... and a Shisha) Off ya tree sells em, but not well priced, if u live in melb let me know and i can tell you bout a shop that sells hookahs,

as for a bong with a couple of pipes, pretty easy to make, all you need to do is make a regular bong, out of a coke bottle or whatever you make it with, make a couple of holes in it and find some kind of tubing, shove them into the holes (remember to put the holes at the top of the bong so you can fill in enough water)