99MARKSS:
I have the Dragon 1/72 King Tiger 312 (with the white on the front of the tank) and got a pretty good built 1/35 King Tiger 312 on ebay a few years ago.
In reference to your custom FOV 1/16 King Tiger 312, a good reference book on 312 and other SS King Tigers of Jochen Peiper are covered really well in Gregory Walden's TIGERS IN THE ARDENNES. It features the King Tigers, what happened to them in the Battle of the Bulge, their paint schemes, etc.
Walden says about 312, "knocked out by a tank destroyer near Geronne...probably around 30 December during the 1st SS Panzer attacks against Bastogne.
Description: probably brush, no light and shadow pattern dots visible, turret numbers appear to be the same light shade as 332. Part of the hull appears to have a coat of whitewash paint. Other details not visible. Seen in post-battle photographs."
I try to keep up with how much the FOV 1/16 King Tigers sell for on ebay, and the most expensive was $2,500.00 plus $131.11 shipping back in July, 2017.