I have seen the pictures you posted but I couldnt get much from them.
Nobody seems to post any close up pictures!!
But anyways, I will go to RONA tomorrow and hopfally they have somthing I can use. I will post up my findings then, but if anyone has anyother suggestions or comments, post away.
The local shops have been 0 help with this subject. Im sure if I told them I was using sewer pipe for an intake they would laugh!