Re: HMV Japan anyone?
Google trick - when the site's own search isn't adequate, search it using Google by adding the keyword "site:[domain]". In this case the query site:mania.com hmv returns several relevant results.
Anyway, I've ordered from HMV (Japan) before, but mostly games. They're alright. The problem for me is precisely that they ship through EMS, as that has a 100% hit rate with Dutch customs. So for games I prefer YesAsia or PlayAsia, which allow airmail shipping and have a much higher chance of bypassing customs.
If PlayAsia (or YesAsia, which also still list them as available) doesn't work out, you can try getting a Tenso.com account so that you can use the Japanese Amazon Marketplace. I just checked - prices for volume 2 at least don't seem so bad (higher than normal of course, but no insane prices).
No Blu-ray, No Buy*
*) For series animated in HD and available on BD in Japan