With the 3 speed, you can add the 5.125 diff gears from 4 or 5 speed kicks, and be re-geared well for 30-31" tires. If you already have the GV springs, slap 'em on (2-4 hours with a friend) and see how much lift you get (will depend on how "fresh" your springs are compared to the GV). From there, your lift options are (NOT considering international shipping):
Jeff's spring spacers (he'll chime in) for about $200 (retains stock suspension travel & ride quality)
OME for $700: Vastly improves ride quality (will probably need to do 1" of fender trim or body lift to fit 31")
Body lift (DIY for cheap - $200): I'm not usually a fan of doing more than 1" of body lift, but a lot of guys do it.
The searching on this site stucks. Use google's advanced search by typing, "[insert search stuff here] site:zukiworld.com". This will search all of zukiworld (including tech articles and bbs).