A number of us have ordered Hellwig parts (and probably other suspension stuff) from
SD Truck Springs.
I've found them to be good. If you're willing to install all your own parts, you can do a full-on chassis upgrade (Shocks, Steering Center/Stabilizer like Safe-T-Plus, Sway Bars and Rear Track Bar) for well under 1/2 of having that done at retail. Retail using Roadmaster bars and paying labor is going to be around $4000.
If you need it done at a shop, call Henderson's Line Up in Grants Pass OR and ask them who they are affiliated with in your area. That should net you a knowledgeable shop.
