These are machined from 6061-T6 billet, they are anodized gold and will come with the bushings minus nuts and bolts to mount them to the spare and false spar.  They must be installed before the wing is assembled.
 
I will give you the AN part numbers when you purchase the hangers for hardware required.
 
This is stronger then the adapter and bolts directly to the wing spar.  Looks more sexy!
 
These are sold each so if you have a wing with 4 hangers times the price by 4
 
Experimental Only, No FAA approval