If your springs are not broken there is really no need to replace them. Or if you have just a couple broken springs, you can buy what you need to fix them. The foams I would go with ACI foams, they are made in the USA- they are a softer material, they look and feel just like the originals did. You are going to have a good sounding car and nice interior to boot this year.
ACI "AMERICAN CUSHION INDUSTRY