Hi You can find it here(autosparepartsusa) even i was searching the same thing, i am sending you the link also find it over here.
Some parts are, the 2.7liter is but some of it's electrical components are not
I do believe it is the same body style and most things should transfer over to the 1993. It may have some electrical differences but not many. You can also transfer parts from a 1994 Acura Legend.
Any auto parts store can help you with that.
http://www.hemmings.com/parts/search/?start=0
When looking to buy parts for an Acura Integra then this may be possible by visiting the Acura Parts Online website that sells official parts for the Acura Integra.
You can buy Acura parts directly from Acura at www.acura.com/store.aspx . They redirect you to local dealers from which you can purchase the parts and bring them to your mechanic.
Try a local junk yard or parts recycler near you. They often have these parts for $5 to $20 dollars. If you can't find one there then call your nearest Honda / Acura Dealership.
The best place to find new Acura parts to replace your old parts would be the official acuraautomotiveparts.org. They have all the parts you need for your Acura, and offer them at great prices.
Almost all body parts from a 94 will fit on a 91.
Acura dealership is probably the best place for an individual to purchase parts of an Acura they are looking for. Otherwise, local dealerships might have some parts available for certain models.
Acura Columbus is a certified Acura dealer with an onsite parts and service department. They are located at Acura Columbus 4340 W. Dublin Granville Road Dublin, Ohio 43017. The parts dept. phone number is : Parts: 888-306-6029. You can visit them online at : http://acuracolumbus.com/
When the check engine light is on, the computer sets a fault code. Most auto parts stores will check this code for free and tell you how to fix it.