Originally Posted by
az3579
I was in your exact predicament for a few years. It took me 4 years to finally source a Natural Brown interior, and boy did I get lucky (full interior with extra bits that I sold to make some of it back).
The problem you're going to run into is the front seats, as you said. In my case, finding sport, heated, front seats with lumbar support was impossible. Luckily the set that I bought had exactly that - with the folding rears! This is something you should pay attention to. If your car has folding rear seats, you need the folding rears; I don't think the folding/nonfolding are interchangeable.
You'll just have to consistently check eBay, craigslist, E46Fanatics, etc. for interior sets that pop up. That really is your best bet...