Yes you can buy I-beams.
You can usually get suspension/steering parts from local autoparts stores or online. The I-beam would probably have to be purchased from Nissan or local junkyard.
Struts (for some cars) can be purchased as replacement cartridges or some suppliers provide "quick struts" which is entire strut assy, including new spring.
I would sit down with mechanic, list all parts you need from the Nissan diagnosis, and shop around for pricing.
Look at local sources, internet parts suppliers and local junkyards.
Have mechanic give you a labor charge, total up cost of parts/labor and see what you come up with.
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Friday, January 29th, 2010 AT 6:00 AM