After announcing they will be producing human faces in their 1/12 Plastic Model Kit range for Star Wars, starting with Han & Luke in Stormtrooper armour, Bandai are looking to tweak their current Vader kit to include an unmasked version.
On display as a prototype at the Winter Wonderland Festival 2018, the kit uses the existing kit body but adds an unmasked head with an excellent likeness to Sebastian Shaw. The cloak also appears to have been tweaked.
We await more details now from Bandai as to the release date and price for this figure. It is positive to see that the Bandai licence for selling these kit figures has been expanded and US distribution will begin soon with some older kits. This will have a knock on effect for UK market. That means this figure "should" be easier/cheaper to obtain in the long run