Update.
Well, Edcor has, IMO, some odd practices. They'll sell you raw end bells or some black painted ones but apparently not the blue painted ones. Their reply, "We only sell what is listed on the website.". Just seems odd they'd not sell the blue ones despite using them every day. Anyway, I'll make do without their help.
Got most of holes drilled/cut in the chassis' yesterday. Now to mount in the tube sockets and start planning out the component locations/where terminal strips might be necessary.
Edit: Got the Hammond end bells "adjusted" with a 6" C-clamp and a couple small blocks of wood. With that method the raised area pressed down nicely so they sit flat and have room for the flange of the snap bushings.
Got a coat of the RAL 5010 paint on them now. Hopefully it matches decently.