Google Jeff's Customs in Arizona.
Great looking bubble type steel reproductions.
$250 USD per pair plus shipping ( to Australia about $120 USD )
They look pretty similar to the originals.
The 37-39 fit against the opening.
According to Kube and the others the 40 spats sort of overlaps likes Jeff's ones.
I bought 2 sets - haven't fitted them yet but they are steel and look great.
I do have a set , they are in great condition. I can send you pictures if you like. They are originals. TOM tom@tlpclimate.com