Apologies yet again, guys. I have a bad habit of getting projects 90% done and then finding myself too busy to just finish it off (hopefully I'm not the only one who suffers from this affliction). I have time this weekend and will move this forward so that I can share all of the reproduction designs I have been working on.
As for accuracy...that's certainly the primary goal and the reason reproductions like the nice one available at Arcade Artshop just are not quite accurate enough for me.
Regarding the yellow gradient fade on the Hey strip, it's actually a bit of a moving target as Hey's own version varies in color intensity and location of full dropoff to white. Take a look next time you're lucky enough to go. My repro design attempts to recreate the most common version.
I'll update again in a few days.