Any of these will fit:
The FJ80 Landcruiser Spring
a cheap effective way to achieve a good amount of lift and flex is to install FRONT springs from a FJ80 (1991-1997) Landcruiser in the REAR of the 3rd gen. there are many different versions of these springs but that main way to identify them is to count how many wraps they have which generally will determine how much lift you will get. you can usually pick up a pair of these for under $100 at a junkyard or on a forum classified section.
7 wrap is about 3-3.5" of lift
8 is about 4"
9 is about 5"
Height of spring/color code/wraps
21" Blue Pink White 9.25 wraps
21" Grey Orange White 9.25 wraps
20.25" Blue Yellow White 8.75 wraps-one of these is a confirmed LX450
19.5" Green Yellow White 8.25 wraps-one of these is a confirmed LX450
19.5" Purple Green White 8 wraps
19.25" Double Purple Dark Blue White 8 wraps
19" Double Pink Light Blue White 7.5 wraps
18.5" Double Pink Grey White 7.5 wraps
18 7/8" Orange Orange White 7.75 wraps
you can also use the OME 851, which is a lift spring for the FJ80. that usually gives about 6 inches of lift.