I have got a set of old rear springs you could have if you just want to lift the front a little, problem is not sure if you want to make the suspension any stiffer?
Are you planning on replacing the springs yourself?
I recomend you buy a pair of shock turret retainming rings, not sure if that is ther propper name for them, they are the rings with 4 studs pointing up that go through the spring mount and hold the turret on.
I always tend to break off some of these studs when I take turrets off.
Spray the bottom shock mounting with loads of wd40 for a few days before you plan on doing the job.
With the shock removed you dont have to jack the front up very high to remove the spring.