You might consider relaying some information about your project so you can determine which dealer might be the most appropriate to work with. Many speed shops and builders specialize in [or have a large amount of experience with] a certain car and chassis. This will be your best value. If you troll only for the lowest monetary cost you will find that these products [and most other quality products] are sold in a very narrow range of monetary cost...certainly not enought difference to negate the superior tech advice [about your entire project] that a knowledgeable shop can give you.
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Bret Voelkel
President
RideTech
Air Ride Technologies, Inc.