I ended up with Marco Specialties Terminator 2 Skull in a pile of other parts. I had heard that it didn't look very good, and I can see how someone could be sorely disappointed with it. There is very little detail on it, making it look very flat and cartoon-like.

http://www.marcospecialties.com/pinball-parts/03-8569

Comparison photos between marco's skull and an original skull.

20160725180551441_(resized).jpg20160725180710893_(resized).jpg20160725180603067_(resized).jpg20160725180623350_(resized).jpg20160725180636256_(resized).jpg

[edit]: Another comparison: https://pinside.com/pinball/forum/topic/terminator-2-clubmembers-only/page/56#post-2140236

Yes...

Yep, exactly.

I'm not seeing the skull anywhere on their site.

I usually see broken chins and cracks on the sides near the brackets.

The NOS skull I picked up has a crack through the middle of the chin that I didn't notice when I originally bought it. Sigh.

Has anyone come up with a good way to reinforce the skulls since they're made of such fragile plastic?