I used a 3d print which was processed and painted accordingly. Maybe if someone printed this in resin, you could cast this in latex? Not sure how this works exactly, but here is a link to that file:
Model available for download in Stereolithography format. Visit CGTrader and browse more than 1 million 3D models, including 3D print and real-time assets
www.cgtrader.com
The size you get by default is in 1:6 scale, but I simply scaled mine up to 1:1. I think it looks very convincing.
That does look really nice, but the paint job would have to be stellar. Only convincing way to have a human bust is beautiful paint or silicone in my opinion.
I am sure you can find a stellar artist to prep and paint this sculpt. I am happy with how mine turned out, but I am not sure it can be called "stellar".
One additional factor IMO is to replace the plastic eyes with inset realistic glass eyes. This makes also a big difference.