new 300ex head pipe

I just recently had my header pipe crack in half so now im in the market for a new one. I've seen people saying the factory pipe is small, so im thinking about getting an after market pipe to put on it with my factory muffler. I don't want to spend much on the pipe, preferably not over 100$. Im finding it hard to find a good deal on anything. On ebay there are some pipes, but most come off after market systems so i don't know if they would work.