I would suggest yahoo Japan auctions. However, you will have to use a proxy service to do your bidding, unless you live in Japan. The service I used quite a bit is Celga. Another is Rinkya. www.rinkya.com has a nice search feature, but alas, Marine Boy does not come up. You can request they add a link though. I did for Speed Racer, and bought a number of very rare and Japan only items.
Here is a kit using the search term "Imai" on Rinkya, then choosing Imai hobby and culture: http://www.rinkya.com/new/en/auction-125229491
Good luck on your quest! Finding an item like this can be very rewarding!
Here is a kit using the search term "Imai" on Rinkya, then choosing Imai hobby and culture: http://www.rinkya.com/new/en/auction-125229491
Good luck on your quest! Finding an item like this can be very rewarding!
