My little piece of cowling just arrived from Impex Japan. It cost a bit over AU$20, but I'm not even going to think about the cost of freight via Fedex (and they were the cheapest). They don't offer mailing as an option. Somehow the Chinese can send stuff from Hong Kong post free. Impex ordered the part from Honda (after I paid for it) and emailed me when they had received it. They then lodged it with Fedex when I paid the freight. The whole process took about two weeks.
So in my experience they are reliable, but expect the pay dearly for the privilege.
Oh, and I misunderstood the freight component, thinking from what I read on their website that freight was included. I guess that might be what people were unhappy about- I haven't looked for any reviews online.