Unicraft have released a couple of 1/72nd resin Luft 46 and a Douglas DS.312A, which was a WWII US pusher fighter project.

Douglas DS.312A
In the late 1930s, as America geared up for the war it knew it could not long avoid, U.S. airplane manufacturers began developing concepts for large, heavy fighters that could combine speed with overwhelming firepower.
One of the seminal designs from this period was the Douglas DS-312A pusher. It was designed to have an Allison V-1710 liquid cooled engine mounted mid-fuselage and driving two counter-rotating rear-mounted propellers. Putting the props in back provided more room for big cannons up front.
Although it never went into production, the DS-321A was the direct inspiration for an entire generation of WWII-era pusher projects, including the XP-52, the XP-54, The XP-55, and XP-56 and the XP-59.

Messerschmitt "Wespe"
This was one of two "Wespe" ("Wasp") designs explored by Messerschmitt in 1943. This one featured a single He S 011 turbojet engine mounted mid-fuselage fed via an air duct wrapped under the forward fuselage. The cockpit was positioned far forward. Both nose gear and main gear retracted forward.
Although no armament was specified, it probably would have carried two MK 108 30mm cannon mounted under the pilot's seat.

Arado 16/43-15 (Ar.15)
The Arado Ar TEW 16/43-15 concept was born out of an in-house research project studying the possibilities of jet-powered fighter aircraft. The design appeared as early as March of 1943 and became yet another example of the forward-thinking in aircraft technology as sponsored by the many German engineering firms of World War 2. The intent of the Ar TEW 16/43-15 design was to mate a jet engine with rocket-fueled power to complement all-out performance above 32,800 feet. The design never materialized passed the "paper" stage however.

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