Heard some good things about ball joint spacers but i would be a bit worried about getting a decent wheel alignment afterwards.i have spc uca's which have a heap of adjustment/setup options in the upper balljoint.no worries with alignment but since i have a thai i have adjustment also on the lower bush via a offset cam adjuster.if you have those you Might get away with just ext ball joints.just to keep the cost down but to future proof the alignment and any extra lift later i would only reccomend some new UCA's...brands like SPC..PRG...spc you can get from repco/bursons/fulcrum or direct from the USA via 4x4parts.com...prg is direct order only i believe.
Spc uca can be soursed from the US for under $600 delivered.
There are a few other optionas for uca.bu these are the ones ive had experience with.