I was able to secure an original equipment rear rack off of a beater 1989 NX125. Naturally, that large on-line auction site was the "source". How do I know the donor bike was a beater? Most of time, when I person parts out a bike, and subsequently offers those parts for sale, they post images of said parts. I reviewed all of the NX125 parts this person had to offer and it was pretty obvious that one bike was the source. It appears as if said bike was also painted with a brush and had seen a hard life. I corresponded with the seller, who was certainly nice enough (this is no reflection on him), but based on some of his statements, that NX was ridden hard and put away wet for most of its life (again, no reflection on the seller). Even as I look at the rack, it appears to be tweaked, slightly twisted in such a way as to indicate it hit a solid surface most likely when the bike was dropped. The rear turn signals, along with the special mounting brackets were not even on the NX when the seller acquired the bike. So much for lucking into some rare and expensive parts.
For fun, I checked to see if the Honda TransAlp rack plate would fit (to provide a larger platform). It snaps right into place. Sweet. That also means I could revert to the Givi Top Case if I wanted. I wouldn't mind using the top case on this rack because it will be more securely mounted to the bike (than my home-made rack is/was).