Nissport sells a kit. You can Google them.
I ordered one last month. Took about a week to arrive. No problems.
Comes with block off plates, gaskets, and the correct...uh...metal screw-in part for capping the bung in the header/exhaust.
To get rid of your CEL, you can install a resistor in line, or leave just one (1) part of your EGR system, as outlined and pictured in a thread of mine ('93 Classic Restoration). You can cap off the vacuum lines, and while still bypassing the EGR in function, it allows the ECU to "see" what it is supposed to see. No CELs in my vehicle.
See the last four or so pictures in this post...
http://www.sr20-forum.com/members-rides/12127-93-classic-restoration.html#post158127
Hope that helps.