I had the BDR hub machined down and drilled to accept a "Chrome" (polished Al) NRG unit. It matches perfectly, but I later realized the VMS brand is the exact same one for 1/2 the price. I also had to get both the wood and leather wheels re-drilled, but now I can switch them out. Oh, had to buy another one to get the hub adapter for the second wheel, so VMS is definitely cheaper option. Not sure how to insert images, but I'll give it a shot and insert a dropbox link if anyone is interested.
https://www.dropbox.com/s/ycvef07dk6..._8856.JPG?dl=0
https://www.dropbox.com/s/4ah2tk22n6..._8857.JPG?dl=0
https://www.dropbox.com/s/fslpi7671y..._8859.JPG?dl=0
https://www.dropbox.com/s/ykcf6855xz..._8860.JPG?dl=0
https://www.dropbox.com/sh/1cczb2sbo...xU1946Hsa?dl=0