For your consideration

It's not because they removed them from challenges that you're running out. It's the massive imbalance between the usage of the various +36 gold gear as assigned to heroes by the devs that's the real issue. No one has ever complained about running low on the medpac or keypad salvage (the other gold challenge gear). The devs are massively overusing the gold orbs - both as regular gear and as g11+/12+ components.
Unfortunately adding them back into tank prize pack won't make much of a difference unless they substantially increase the amount of salvage you get. There's so many prizes in there that the chance of you getting a drop makes it a very unreliable source of gold orb salvage.