Well, you know that there have to be some companies that offer products for your Isuzu. Here is a list of some of them. We are not including general parts stores, unless they have something that you can't find elsewhere. For general car parts for your Isuzu, may we suggest Import Parts Bin

4x4/Off-road related

http://www.darlington-offroad.com Joe offers lift kits and other items to beef up your truck for off-road use.
http://www.independent4x.com Matt does a great job making bumpers, sliders and other rock-proven accessories.
http://www.hotrod-offroad.com Dan@HotRod offers many products for you Isuzu. Shocks, lockers, and replacement parts.
http://www.calmini.com One of the original Isuzu aftermarket suppliers, they offer everything from bumpers to headers
http://www.allhyundaiisuzuparts.com/ This company sells used Isuzu parts. Consider this as a "junkyard" where they pull and inspect the parts before mailing them to you.
One of the original Isuzu aftermarket suppliers, they offer everything from bumpers to headers
www.arbusa.com Want traction? Get an Air Locker from ARB. Don't forget to check out the Bull-Bar

http://www.aftermarkettrenz.com

http://www.isuzuperformance.com