dennislbrooks, nicely done!
70ssclone, are you determined to use the reproduction caps? I have "4 nubs" wheels and I am using stainless generic caps. It took some time to find an actual stainless set but they exist. Of course I had to find an "internal clip" style for my bed mounted spare. But they look close enough for me.
The internal clips are available from multiple aftermarket suppliers. Drill n tap or drill n rivet, they're not too hard to install.
https://www.youtube.com/watch?v=44oLR_1NxT8
Maybe the OE caps will cover enough of the external nubs to look ok?