just following up to close the loop, so to speak.
I sent a complaint via an email to nfieldgear.com. The purchasing manager followed up by sending me, free of charge, a new set of the brake cable/speedometer cable grommets for the front fender. They appear to be the same as the ones that were originally on the motorcycle. I have not tried to install them, yet, but I'm pretty sure that they are just what I needed. So, I'm back on the side of nfieldgear.com. Thank you.
one more final note for anyone who's interested: the nfieldgear.com part number for the correct cable grommets is 142532.