Actually, thats the kit I'm looking at. Saw the episode and contacted Ian about it. He said he ended up putting the canister in the tub behind the seat just flipped from the stock position. Told him my spacing problems and he said he's going to measure and see how much space the can actually takes up.
I'm hoping it doesn't take much space and hoping I'll just be able to put it behind the back seat. If not, I'm sure I'll have to get creative and put it in the engine compartment or something.
As an aside, Ian is really good about answering e-mails and whatnot (as long as it isn't an email blathering along about nonsensical junk). Best place I've found to contact him directly is over on Pirate4x4. His login is "Ian from Xtreme"