It looks like you can get custom made torsion bar springs and coil springs to your exact specs to whatever you need to smooth out the VX ride. A few minutes on Google shows lots of choices.
http://www.kdkforging.com/torsion_bars.php
When ordering, don't talk spring rates. The wheel rate is the only thing that matters. You now know the wheel rates for the front and rear stock '99 springs. Order 'em, install 'em, BAM you're done. A custom VX ride to your exact needs and wishes.
Mark Griffin
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