replace/repair worn leaf springs

[54chevytruck]

I have a 54 3100 pickup that has been heavily modified, it weighs at least 3 tons, but still has the original 1954 leaf springs which are not doing so well (see pics)

https://docs.google.com/a/oceaneerin...5QRUc5X1E/edit

https://docs.google.com/a/oceaneerin...FWRHpjelk/edit

https://docs.google.com/a/oceaneerin...o4T21ZNjA/edit

https://docs.google.com/a/oceaneerin...dDOVJKMEE/edit

the front springs are bending the wrong way and the rear leafs are completely flat...

I cant really afford to spend much on this, so i am hoping someone can give me a good solution to this problem.