Originally purchased from Jspec.com (and they seem to no longer carry it), I've got a never-used, new-in-the-box Autech-style (replica) grille for the '97-'98 Kouki S14 240SX. I originally purchased this intending to install it on a '97 240SX that I ended up not buying (that'll teach me to buy parts before the car). Made of fiberglass, primer-coated and easily painted to match your car. Apparently easy to install. I think it originally listed on Jspec.com for about $85, and I see others just like it on Ebay going for close to $100.
$50 shipped to anywhere in the U.S. Send me a PM if interested. Pic below (not the actual item I have, but it looks exactly like this):
