Ok well first do a search for them. it will help you finding what you want.
But, to be nice, KYB GR2 struts for your car are the best. Don't buy them from a mechanic unless you want to get ripped off. ebay is your friend =)
power steering pump...try everythinginfiniti.com and call them up directly.
front bumper lip might be kinda hard...earlier models dont have as many cosmetic options unless you're good with your hands. but you can talk to njprimera about stuff like that. he might be able to fabricate something up for you.