Where do you find key codes for a 1998 Honda civic?
The Key Codes can only be found by going to a Honda dealership with your original Ownership and Valid Drivers License. They will use your VIN to obtain your Key Code.
Concluding from the meaning of the question it is about where to purchase weatherstripping for a 1998 Honda civic. In my opinion the best solution is to go to the shop with car accessories or to find something via Internet, because nowadays there is a thousands websites offering many different car spare parts.