I do want to reiterate a point made by @Kodiak earlier, when it comes to the matter of 3D parts.
Getting a 3D-printed mask is probably cheaper than getting official ones in certain cases, meaning that, were one of those rare official ones to win, then it’d be harder for people to recreate it than if a 3D-printed mask won.
I mean heck, one of the entrants has consistently used rare and expensive parts in his contest entries.
Some of these parts were only printed in limited numbers, like the trans-blue Mask of Water, others are extremely rare drops due to the changeover between two different shades of the same colour, like the pearl gold Kraakhan, and some are just straight-up misprints, like the Toa-coloured Noble masks from 2001.
Even some masks that were made for retail sets are extremely expensive now. Want to know how much the gold Ignika is on Bricklink?
$150. That is not a joke.
Oh, also, there are only six of them left on the site. Four in the US, one in Russia, and one in the UK.
Want a blue Matatu? Well there’s one in Germany for £26, but past that you’re looking at a minimum of £40. For a mask.
The Rurus appear to be the most common of the Mata-coloured misprints, so what about them? Want a red one for Kapura? There’s six of them, they’re all in Europe, and they start from £19:75. They seem to be cheaper in other colours, but they’re basically all in Europe, besides the black one, which got mass-released in the Power Pack and Hafu’s individual 03 set.
How about the dark blue Ruru from Idris, one of the only Toa-suiting masks widely available in dark blue. Probably quite desirable considering that both Tuyet and Orde are on the horizon. None left. They’re all gone.
That trans-blue Mask of Water I mentioned earlier? Not even listed.
With 90% of the 3D printed masks, you’ll pay more for shipping than for the mask itself, and if you happen to have a 3D printer yourself, then you don’t even need to pay for that.
3D printed masks are way more accessible than the rare masks. And, as a bonus? If you wait for a bit after the art contest wraps up, then you can probably get a printed mask which is actually the canon mask design, instead of shelling out silly money for something that’s actually just a placeholder.
So if your main concern is accessibility, then a 3D option is much more accessible than even some official parts released at retail.