GK
LM has been claiming a couple of sets of numbers.
One is a $49.5 million unit recurring flyaway cost (URFC) that does include the engine. A few snags, though. You are not going to get the airplane for the URFC because there are always non-recurring costs in there for "ancillary equipment" (things like weapon pylons/adapters). It's priced in 2002 dollars, and you don't have any of those. It's also not the price today, but an average if you build 2,200 jets between now and 2037. And from a UK viewpoint, it's also worth remembering that the F-35B and F-35C are and always have been much more expensive than the F-35A.
And indeed, this chart that they use all the time omits the engine.
So I suggest you take your talk of slander and go back to f16.net.