Dam Dust covers

I'm still working on the Kelsey Hayes conversion for my 66 Barracuda. The spindles are from an early Duster. I can't seem to find the wheel bearing dust caps in a size that fits. Too big, too small, when I measure the beat up originals, it appears to be 1.780" dia. . I found 1.813", 1.800",1.562" , but I'm just not finding what fits.

I bought what was available and tried to get that sucker to fit, didn't work.

Anyone have advise?