if you really want the hassle to import in new hard-top, japanparts could to it to your doorstep but our local customs levy are a little $$$. cost below dont include our local tax.
JAPANPARTS: HARDTOPs are BACK!! US$1,995 ('til APRIL 30th )
http://www.spyderchat.com/phpBB2/viewtopic.php?t=37668
Even on official toyota website its not cheap. you will have to wait & see if someone locally is interested to sell hard top separately from their car.