Throttle linkage parts are reproduced. Maybe that's what you saw in the NPD catalog. As far as I know, kick down linkage parts for 64 1/2 and 65 Mustangs with a V8 and C4 are not reproduced. From my personal experience, obtaining the complete kick down linkage setup for a 64 1/2 or 65 at a reasonable cost, takes some effort. It took me a couple of months of searching and tracking down leads via email and phone calls. Kick down linkage parts come up on eBay from time to time. I eventually found what I needed on craigslist.
Keep in mind the 66 Mustang kick down linkage is different from 65. One option you can consider is converting to the 66 style kick down (cable vs a rod) but this would not be correct for a 65 Mustang and requires switching out additional parts. Keep looking, something will turn up.