I would suggest getting some Deaver springs, they are infinitely better than stock. Deaver's Tacoma bolt-in spring pack has 7 leafs instead of the factory 3 which provides for a way more progressive and smoother ride. They run about $450 a pair from
Kartek. They do provide about 1.5" of lift so you might consider adding something up front to match that height.
If you have a business address they can ship to usually that will save $$$.
Good Luck!