When it comes to an intake just get one off ebay, aslong as they are mandral bent they are basicly the same, just throw-out the cheap filter and get a K&N fillter, I have a ebay ram on my integra and am happy with it.
as for header, megan header off ebay is cheap and shouldnt fall apart they go for like 100 bucks. Dont go cheaper, others have crappy welds and might fall apart. Remeber it is just bent piping, dont get hung up on names.
As for a exhuast, with your mods being just a I/H just go to a muffler shop and tell them to make you one, it will cost under 100 dollars for 2 inch piping not including the tip. It wont be manderal bent but dont worry, the perfomance you would get out of a catback name brand would'nt be much on a SOHC motor w/out internal mod (ie camshaft)
The tip you could go for a big fart can or something else, doesnt matter your choice.
Stay cheap, If you plan on doing a swap later on, dont go spending 1,000 bucks on this motor, with the above mods you can learn to work on your car, and give it a nice little pump up in performance.
good luck