In 2010 A couple of guys in Israel decided to build a large CH-53 from scratch. After several years of building and developing they have made the fuselages available to buy. It turned out that having built one, they decided to build another, different variant, and bigger, and the first was big to start with at 2.6m long, the second grew to 2.8m long. There is a lengthy description of the full process of creating these models on the Scalerchelis.com website.
CH 53 build up
The details of the kit are as follows
CH53 A-D model is 2.6 meter nose to tail.CH53 E model is 2.8 meter nose to tail. The kit is a very high quality, lightweight and highly detailed fuselage and parts It is made of composite materials (fiberglass and 3mm Devinicell core sandwich) and carbon fiber reinforced. The fuselage is completely scale detailed including all panel lines and rivets. Tail section is all made of carbon fiber. All doors, ramps and hatches are operational. Auxiliary fuel tanks and supports are removable so it's easier for transport. Carbon reinforced plywood woodwork ribs and longerons are preinstalled in the mold. The fuselage was designed with the internal woodwork that includes ribs and the support for the mechanics in a way so any mechanic for large helicopter can be adopted. There is a structurally very strong horizontal plate (already tilted 5 degrees forward) mounted on the top that serves as the interface to the mechanics. The fuselage kit includes the following: Composite fuselage Full set of doors including cargo ramp and upper cargo door. Full set of hump cowlings and access panels. (7 pieces) Engine nacelles that includes NG box cowling and EAPS. External fuel tank External fuel tank supports. Elevator. Full windows set (tinted cockpit upper windows). Full set of woodwork frames and ribs (carbon reinforced plywood) installed in the fuselage.
No landing gear is supplied ,but full drawings and a CAD file are enclosed with the kit, and the mechanics are entirely up to the builder.
Here are some pictures of the two models for comparison