From my understanding 96-98 civics all use the same front bumper. If you plan on adding fog lights to the OEM bumper, they go on the furthest sides of the grill opening. You have a choice of either square of circular fog lights.

99-00 civic front bumpers have one center grill and two smaller "grills" on either side that could be used to house OEM fog lights.

If you want to get a new [98] OEM bumper, there should be a sponsor here on HAN that sells OEM parts.

If you're looking to do the 99-00 front bumper conversion on your 98, then I think you need the front bumper, headlights, fender and hood to complete the conversion.

A quick search will tell you a lot more info if you need it.