Just a quick update:
I've been refining the fit of the PCBs to the L-bracket (after trying to do some metal work and finding some small dimensional discrepancies). I drew up a pretty rough CAD drawing of a finished L bracket and sent it to a local metal fabricator here in my city. Waiting on a quote from them.
Also cleaning up/organizing the BOM, thanks for your patience, guys!
PS - To everyone who wants a face-plate/metalwork kit:
What do you think about the faceplate styling??? If we can all agree on the design, I can order the whole lot from FPE and get a discount. If we order 10 pieces, the price drops from 31.35 each to 25.08 each, and I can ship them out with the PCBs to consolidate shipping.