I found na where I can get greasable bushings!
di ko na papagawa bili na lang ako
check this out: http://www.rocky-road.com/zuksus.html

Greaseable Bushing setup for entire vehicle

Truly the ultimate in setting your entire Zuk up for a smooth free flowing ride. This top of the line bushing kit includes all bushings and greaseable bolts for the entire vehicle, front and rear on all four springs. No more rusted bolts, squeaky bushings, binding suspension parts. This kit is truly for the Samurai suspension connoisseur.