I just saw that you can get the Gametrak for $10 from geeks.com:
http://www.geeks.com/details.asp?invtid=IN2-RWG0459NA&cpc=SCH
I don't know where all they ship, but this is very cheap. I currently have one for PlayStation 2 which doesn't seem to work on my computer. I am buying the Xbox version, which is supposed to work on regular computers too.
http://support.microsoft.com/kb/906347?sd=xbox
It looks like at worst, you just have to do a little soldering:
http://muppet-modding.com/printthread.php?tid=1103
.hc
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kill your television
$42 postage to japan! yikes!
these look pretty cool though, i might go down to toys r us and see if they have any in stock.