...so, I'm in Japan, and I'm in a city with access to pretty much everything (Fukuoka). The reason why I hesitate to get in on this is because I've kind of been burned before. It wasn't a big deal, but it turned out that once I sent the thing, there were exchange rate fluctuations, paypal charges, and little extra costs involved in shipping that left me with something like -200 yen in profit.
The situation was pretty similar to this one here - a nice favor to a forum member. It wasn't exactly the other guy's fault, because he held up his end of the agreement, and it would have been silly to demand that he pay another few dollars after the fact. However, the whole thing wound up taking up a couple hours of time total and had me going out of my way, and in spite of the good karma buzz, I really didn't feel like doing it again. When asked, I didn't.
I'm not hinting at anything, but if you want to catch more interest, you should give more specifics. What exactly you want, where to buy it, how much it costs, how you want it shipped, where you live, and how you intend to pay are all pretty important.
The reality is that if you want someone to become The Japan Connection for the forum, you've got to go the extra mile to guarantee at least a little profit in it, and more so if it involves hunting something down.