Instead of paying $$$ for the factory 16V P/S-alternator bracket, can I just make my own? Provided that it is similar to the factory one?

GCR 9.1.3.D.1.p
All engine components not otherwise listed in these rules shall meet factory specifications for stock parts.
Only catch is I can't make cast iron, so it would have to be made with angle iron. But otherwise it would mount the alternator and P/S in the same location as the pricey factory bracket. A/C has been removed, and I'd like to mount the alternator lower, in the same place as the A/C compressor, same as the factory bracket which is hard to find and pricey.