You don't need a rebuild kit, If the car is driving good no need to mess with it. Now if you have the space why not buy a TT engine and start investing on the VG30DETT so then you could do the swap? That's what I would do. If not the upgrade the body, with suspension, brakes, JDM lights, exhaust, and lightweight stuff.
Bushings
http://www.z1motorsports.com/product...oducts_id=3015
Get familiar with the Z shops.
Www.Z1motorsports.com
Www.conceptzperformance.com
Www.specialtyz.com
Www.ashspecz.com