I noticed some months back that the RAF C-model project, 42-103100/FB206, is no longer listed for sale and was never reported sold (as the broker, Platinum Fighter Sales, typically does). If the project is done the way the Muszalas want it to be, I think it is safe to say that it will be very authentically detailed and painted in the original RAF 306 Squadron (Polish) markings. I think ideally, it would be based with an owner in England or Europe - it would be so cool to see a true RAF Mustang, a high-back fitted with a Malcolm hood no less, painted in the original wartime markings and operating on the circuit over there. The surviving section of wing from the original aircraft is really cool, as it still has the original wartime paint, including an RAF roundel painted right over the USAAF stars & bars on the bottom of the wing, with the bars sicking out of the RAF roundel - this was because the USAAF insignia wasn't painted over with any grey paint prior to the application of the RAF roundel, since the existing USAAF neutral grey paint was considered close enough to the RAF medium sea grey (one of those details that should be reproduced in the restoration).
(With Max Chapman having sold "Berlin Express", I wonder if he is or might fund another B/C restoration (of course he was also the original owner of the TP-51C "Betty Jane", also built up by Pacific Fighters).)
In addition to 42-103100/FB206, Pacific Fighters also has the substantial remains of P-51B 43-12112, that was recovered out of a lake in Florida where it had ditched in 1943. Much like the Lake Michigan recoveries of the 90's, I recall seeing a couple photos of the complete fuselage section in storage (tail to nose), still with all of its original paint and trainer code applied to the cowlings. Perhaps one day we'll see this become an active restoration/flyer.
As already mentioned, "Lope's Hope 3rd" and the Pacific Fighters/Dusty Dowd P-51A are set to be completed/flying very soon.
The rebuild of the Beck P-51A, last I saw, was very near completion - I seem to recall some mention at times (as far back as 2012), about having the aircraft finished/flying and brought back to Reno, though I haven't heard/seen anything about the aircraft recently.
With regard to Brent Hisey's P-51C, it has been quite a long-term project - I recall first learning of it in February 2010. Back then, as it is I think still now, the plan is to finish the aircraft as John Thornell's "Patty Ann II" of the 352nd FG (complete with the faux gun ports painted on the wings). I have misplaced where this photo originally came from, but it shows the project as of late 2015 (one can see a very complete tail cone section and the wings underway in the background).