You may be in luck.
Last word I had was that more were either enroute or had made it here, and the prices are still fairly low, in some cases even lower if you're not big on the bolt's serial number matching the receiver's.
TABING, I blew right past your original question about these boomsticks, YES, they're the original No5Mk1 Jungle Carbines, not cut-downs made from No1MkIII's or No4Mk1's. Here's what mine looks like, including what I did to get rid of the supposed "wandering zero" that the No5's have:
The stock was hardcore glossy from the varnish, and the bore was dark, rifling was strong but I had to spend quality time with a brush and applications of JB Bore Paste before I saw shiny metal in there. The stoving, which was basically black paint, was almost totally gone, leaving the oil-quenched metal finish underneath. Easy enough to fix with the Brownell's black epoxy stuff and the kitchen oven. This was one of the "hand-select", extra $20.00 cost specimens, I steel-wooled the wood, then went with a mahogany stain, and hand-rubbed in the linseed oil finish. As you can see by my diagrams, I glass-bedded the little guy for consistency. The front sight blade was way too tall, so a shorter one was ordered and installed. Now with the good S&B ammo, she'll shoot into 2" at 100 yards. But you'll need a good shooting jacket or be built tough to run a lot of that stuff through the JC, it's a stout kicker. For fun, I just load .311" 123gr AK bullets in my Remington .303 brass, it takes the jab out of the gun, but is still accurate enough out of all my .303 Lee-Enfields to warrant making up good-sized batches of the stuff.